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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 29, 2018	Oct. 26, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	CHARLES RIVER LABORATORIES INTERNATIONAL INC
Entity Central Index Key	0001100682
Current Fiscal Year End Date	--12-29
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 29, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		48,096,420
Emerging Growth Company	false
Smaller Reporting Company	false

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Total revenue	$ 585,295	$ 464,232	$ 1,664,566	$ 1,379,124
Costs and expenses:
Selling, general and administrative	113,033	92,428	336,936	277,157
Amortization of intangible assets	18,805	10,357	47,813	30,913
Operating income	84,362	74,062	228,901	225,454
Other income (expense):
Interest income	230	134	694	497
Interest expense	(17,197)	(7,667)	(47,031)	(22,053)
Other income, net	5,910	6,410	24,069	24,004
Income from continuing operations, before income taxes	73,305	72,939	206,633	227,902
Provision for income taxes	12,403	19,945	39,613	73,272
Income from continuing operations, net of income taxes	60,902	52,994	167,020	154,630
Income (loss) from discontinued operations, net of income taxes	0	(39)	1,506	(114)
Net income	60,902	52,955	168,526	154,516
Less: Net income attributable to noncontrolling interests	534	481	1,818	1,312
Net income attributable to common shareholders	$ 60,368	$ 52,474	$ 166,708	$ 153,204
Basic:
Continuing operations attributable to common shareholders (in dollars per share)	$ 1.25	$ 1.11	$ 3.43	$ 3.23
Discontinued operations (in dollars per share)	0.00	0.00	0.03	0.00
Net income attributable to common shareholders (in dollars per share)	1.25	1.11	3.47	3.22
Diluted:
Continuing operations attributable to common shareholders (in dollars per share)	1.22	1.09	3.36	3.17
Discontinued operations (in dollars per share)	0.00	0.00	0.03	0.00
Net income attributable to common shareholders (in dollars per share)	$ 1.22	$ 1.08	$ 3.39	$ 3.16
Service
Total revenue	$ 443,038	$ 326,711	$ 1,226,948	$ 960,640
Costs and expenses:
Cost of services provided (excluding amortization of intangible assets)	298,018	219,725	844,130	641,945
Product
Total revenue	142,257	137,521	437,618	418,484
Costs and expenses:
Cost of services provided (excluding amortization of intangible assets)	$ 71,077	$ 67,660	$ 206,786	$ 203,655

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 60,902	$ 52,955	$ 168,526	$ 154,516
Other comprehensive income:
Foreign currency translation adjustment and other	(6,805)	24,570	(14,524)	69,242
Amortization of net loss and prior service benefit included in net periodic cost for pension and other post-retirement benefit plans	615	883	1,864	2,638
Comprehensive income, before income taxes	54,712	78,408	155,866	226,396
Less: Income tax (benefit) expense related to items of other comprehensive income	257	153	(341)	776
Comprehensive income, net of income taxes	54,455	78,255	156,207	225,620
Less: Comprehensive (loss) income related to noncontrolling interests, net of income taxes	(74)	766	886	1,964
Comprehensive income attributable to common shareholders	$ 54,529	$ 77,489	$ 155,321	$ 223,656

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 138,866	$ 163,794
Trade receivables, net	487,339	430,016
Inventories	125,500	114,956
Prepaid assets	43,764	36,544
Other current assets	42,697	81,315
Total current assets	838,166	826,625
Property, plant and equipment, net	896,901	781,973
Goodwill	1,252,700	804,906
Client relationships and other intangible assets, net	629,733	369,762
Deferred tax assets	24,562	22,654
Other assets	154,595	124,002
Total assets	3,796,657	2,929,922
Current liabilities:
Current portion of long-term debt and capital leases	31,651	30,998
Accounts payable	77,736	77,838
Accrued compensation	112,731	101,044
Deferred revenue	140,760	117,569
Accrued liabilities	109,810	89,780
Other current liabilities	66,911	44,460
Current liabilities of discontinued operations		1,815
Total current liabilities	539,599	463,504
Long-term debt, net and capital leases	1,652,733	1,114,105
Deferred tax liabilities	145,331	89,540
Other long-term liabilities	184,954	194,815
Long-term liabilities of discontinued operations	0	3,942
Total liabilities	2,522,617	1,865,906
Commitments and contingencies (Note 15)
Redeemable noncontrolling interest	17,331	16,609
Equity:
Preferred stock, $0.01 par value; 20,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value; 120,000 shares authorized; 88,315 shares issued and 48,094 shares outstanding as of September 29, 2018, and 87,495 shares issued and 47,402 shares outstanding as of December 30, 2017	883	875
Additional paid-in capital	2,625,256	2,560,192
Retained earnings	460,120	288,658
Treasury stock, at cost, 40,221 shares and 40,093 shares as of September 29, 2018 and December 30, 2017, respectively	(1,673,705)	(1,659,914)
Accumulated other comprehensive loss	(159,448)	(144,731)
Total equity attributable to common shareholders	1,253,106	1,045,080
Noncontrolling interest	3,603	2,327
Total equity	1,256,709	1,047,407
Total liabilities, redeemable noncontrolling interest and equity	3,796,657	2,929,922
Client relationships, net
Current assets:
Client relationships and other intangible assets, net	545,799	301,891
Other intangible assets, net
Current assets:
Client relationships and other intangible assets, net	$ 83,934	$ 67,871

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares	Sep. 29, 2018	Dec. 30, 2017
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares issued (in shares)	88,315,000	87,495,000
Common stock, shares outstanding (in shares)	48,094,000	47,402,000
Treasury stock (in shares)	40,221,000	40,093,000

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Cash flows relating to operating activities
Net income	$ 168,526	$ 154,516
Income (loss) from discontinued operations, net of income taxes	1,506	(114)
Income from continuing operations, net of income taxes	167,020	154,630
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	120,198	97,675
Stock-based compensation	35,908	32,902
Deferred income taxes	(10,385)	18,176
Gain on venture capital investments	(22,760)	(12,321)
Gain on divestiture	0	(10,577)
Other, net	10,036	1,034
Changes in assets and liabilities:
Trade receivables, net	(30,318)	(42,712)
Inventories	(10,340)	(9,500)
Accounts payable	(5,322)	(6,160)
Accrued compensation	6,088	(10,548)
Deferred revenue	33,491	(16,849)
Customer contract deposits	34,455	0
Other assets and liabilities, net	(26,904)	(1,912)
Net cash provided by operating activities	301,167	193,838
Cash flows relating to investing activities
Acquisitions of businesses and assets, net of cash acquired	(822,611)	(22,474)
Capital expenditures	(71,378)	(53,928)
Purchases of investments and contributions to venture capital investments	(20,535)	(42,135)
Proceeds from sale of investments	30,595	6,604
Proceeds from divestiture	0	72,462
Other, net	(118)	(288)
Net cash used in investing activities	(884,047)	(39,759)
Cash flows relating to financing activities
Proceeds from long-term debt and revolving credit facility	2,392,201	229,255
Proceeds from exercises of stock options	30,228	35,089
Payments on long-term debt, revolving credit facility, and capital lease obligations	(1,832,805)	(309,258)
Payments on debt financing costs	(18,337)	0
Purchase of treasury stock	(13,791)	(106,902)
Other, net	0	(3,650)
Net cash provided by (used in) financing activities	557,496	(155,466)
Discontinued operations
Net cash used in operating activities from discontinued operations	(3,735)	(1,489)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	4,664	9,135
Net change in cash, cash equivalents, and restricted cash	(24,455)	6,259
Cash, cash equivalents, and restricted cash, beginning of period	166,331	119,894
Cash, cash equivalents, and restricted cash, end of period	141,876	126,153
Supplemental cash flow information:
Cash, cash equivalents, and restricted cash, end of period	$ 166,331	$ 119,894

BASIS OF PRESENTATION	9 Months Ended
BASIS OF PRESENTATION	Sep. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The accompanying condensed consolidated financial statements are unaudited and have been prepared by Charles River Laboratories International, Inc. (the Company) in accordance with accounting principles generally accepted in the United States (U.S. GAAP) and pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). The year-end condensed consolidated balance sheet data was derived from the Company’s audited consolidated financial statements, but does not include all disclosures required by U.S. GAAP. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for fiscal year 2017. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all normal and recurring adjustments necessary for a fair statement of the Company’s financial position and results of operations. The Company has reclassified certain amounts in the unaudited condensed consolidated statements of income for prior periods to conform to the current year presentation. See “Newly Adopted Accounting Pronouncements” below for further discussion and impact on the condensed consolidated financial statements. Use of Estimates The preparation of unaudited condensed consolidated financial statements in accordance with U.S. GAAP requires that the Company make estimates and judgments that may affect the reported amounts of assets, liabilities, redeemable noncontrolling interest, revenues, expenses and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, judgments, and methodologies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. Changes in estimates are reflected in reported results in the period in which they become known. Consolidation The Company’s unaudited condensed consolidated financial statements reflect its financial statements and those of its subsidiaries in which the Company holds a controlling financial interest. For consolidated entities in which the Company owns or is exposed to less than 100% of the economics, the Company records net income (loss) attributable to noncontrolling interests in its consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. Intercompany balances and transactions are eliminated in consolidation. The Company’s fiscal year is typically based on 52-weeks, with each quarter composed of 13 weeks ending on the last Saturday on, or closest to, March 31, June 30, September 30, and December 31. Summary of Significant Accounting Policies The Company’s significant accounting policies are described in Note 1, “Description of Business and Summary of Significant Accounting Policies,” in the Company’s Annual Report on Form 10-K for fiscal year 2017. Newly Adopted Accounting Pronouncements In March 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2018-05, “Income Taxes (Topic 740) - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (SAB 118).” This standard amends Accounting Standards Codification 740, Income Taxes (ASC 740) to provide guidance on accounting for the tax effects of U.S. Tax Reform pursuant to SAB 118, which allows companies to complete the accounting under ASC 740 within a one-year measurement period from the enactment date of U.S. Tax Reform. This standard is effective upon issuance and the Company has complied with the amendments. See Note 11, “Income Taxes” for further discussion. In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” The standard allows for reclassification from accumulated other comprehensive income to retained earnings for the stranded tax effects arising from the change in the reduction of the U.S. federal statutory income tax rate to 21% from 35%. The Company elected to early adopt this standard in fiscal year 2018 as permitted on a prospective basis, resulting in a reclassification of $3.3 million from Accumulated other comprehensive income to Retained earnings as a result of remeasuring the Company’s deferred tax liabilities related to its pension and other post-retirement benefit plan gains and losses. The Company’s policy is to release material stranded tax effects on a specific identification basis. In March 2017, the FASB issued ASU 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” The standard requires an employer to disaggregate the service cost component from the other components of net benefit cost and provides explicit guidance on the presentation of the service cost component and the other components of net benefit cost in the statements of income. The Company adopted this standard in fiscal year 2018 and applied the changes retrospectively to the presentation of the service cost component and the other components of net periodic pension cost in the statements of income for all periods presented as required. The adoption of this standard increased Operating income by $0.1 million and $0.7 million during the three and nine months ended September 30, 2017, respectively. In connection with the impact of Operating income to the Company’s reportable segments for the three months ended September 30, 2017, Research Models and Services (RMS) decreased by $0.1 million, Discovery and Safety Assessment (DSA) decreased by $0.3 million, Manufacturing Support (Manufacturing) decreased by less than $0.1 million, and Unallocated corporate increased by $0.4 million. For the nine months ended September 30, 2017, Operating income for RMS decreased by $0.1 million, DSA decreased by $1.0 million, Manufacturing decreased by less than $0.1 million, and Unallocated corporate increased by $1.7 million. In January 2017, the FASB issued ASU 2017-01, “Clarifying the Definition of a Business.” The standard clarifies the definition of a business by adding guidance to assist entities in evaluating whether transactions should be accounted for as acquisitions of assets or businesses. The Company’s adoption of this standard in fiscal year 2018 did not have a significant impact on the consolidated financial statements and related disclosures. In October 2016, the FASB issued ASU 2016-16, “Intra-Entity Transfers of Assets Other Than Inventory.” The standard requires the immediate recognition of tax effects for an intra-entity asset transfer other than inventory. The Company’s adoption of this standard in fiscal year 2018 did not have a significant impact on the consolidated financial statements and related disclosures. In January 2016, the FASB issued ASU 2016-01, “Recognition and Measurement of Financial Assets and Liabilities.” This standard, including a subsequently issued amendment under ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities”, requires equity investments that are not accounted for under the equity method of accounting to be measured at fair value with changes recognized in net income, simplifies the impairment assessment of certain equity investments, and updates certain presentation and disclosure requirements. The Company adopted this standard in fiscal year 2018, resulting in an increase of $1.9 million to Other assets with a corresponding increase to Retained earnings and Deferred taxes of $1.4 million and $0.5 million, respectively. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers.” The standard, including subsequently issued amendments, replaced most existing revenue recognition guidance in U.S. GAAP and permits the use of either a modified retrospective or cumulative effect transition method. The Company elected the modified retrospective transition method. The standard requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The Company adopted this standard in fiscal year 2018. See Note 3, “Revenue From Contracts With Customers” for a discussion of the Company’s adoption of this standard and its impact on the consolidated financial statements and related disclosures. Newly Issued Accounting Pronouncements In August 2018, the FASB issued ASU 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computer Arrangement that is a Service Contract.” ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The ASU is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years and will be applied either retrospectively or prospectively. Early adoption is permitted. The Company is still evaluating the impact this standard will have on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU 2018-14, “Compensation Retirement Benefits - Defined Benefit Plans -General (Subtopic 715-20).” ASU 2018-14 removes the requirements to disclose the amounts in Accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost over the next fiscal year and the related party disclosures about the amount of future annual benefits covered by insurance contracts. In addition, the ASU adds the requirement to disclose an explanation for any significant gains and losses related to changes in the benefit obligation for the period. The ASU is effective for fiscal years ending after December 15, 2020 and will be applied on a retrospective basis to all periods presented. Early adoption is permitted. The Company is still evaluating the impact this standard will have on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” ASU 2018-13 removes the disclosure requirement for the amount and reasons for transfers between Level 1 and Level 2 fair value measurements as well as the process for Level 3 fair value measurements. In addition, the ASU adds the disclosure requirements for changes in unrealized gains and losses included in Other comprehensive income (loss) for recurring Level 3 fair value measurements held at the end of the reporting period as well as the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. The ASU is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years and will be applied on a retrospective basis to all periods presented. Early adoption is permitted. The Company is still evaluating the impact this standard will have on its consolidated financial statements and related disclosures. In June 2018, the FASB issued ASU 2018-07, “Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting.” ASU 2018-07 aligns the accounting for share-based payment awards issued to employees and nonemployees as well as improves financial reporting for share-based payments to nonemployees. The ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years and will be applied to all new option awards granted after the date of adoption. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company’s consolidated financial statements and related disclosures. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815) Targeted Improvements to Accounting for Hedging Activities.” ASU 2017-12 refines and expands hedge accounting for both financial and commodity risks. It also creates more transparency around how economic results are presented, both on the face of the financial statements and in the disclosures. In addition, this ASU makes certain targeted improvements to simplify the application of hedge accounting guidance. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years, and requires the modified retrospective approach. Early adoption is permitted. This update applies to all existing hedging relationships on the date of adoption with the cumulative effect of adoption being reflected as of the beginning of the fiscal year of adoption. The Company is still evaluating the impact this standard will have on its consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment.” The standard simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. This standard is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and will be applied on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The adoption of this standard is not expected to have a material impact on the Company’s consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-02, “Leases.” The standard, including subsequently issued amendments, established the principles that lessees and lessors will apply to report useful information to users of financial statements about the amount, timing and uncertainty of cash flows arising from a lease. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company formed an implementation team during fiscal year 2017 to oversee adoption of the new standard. The implementation team has completed its initial assessment of the new standard, including a detailed review of the Company’s lease portfolio. The Company continues to assess the impact on the existing lease accounting policies, newly required financial statement disclosures, and executing on the project plan. Currently, the Company is performing contract reviews, evaluating anticipated changes to systems, business processes, and internal controls to support the adoption of the new standard. The Company is still evaluating the full impact this standard will have on its consolidated financial statements and related disclosures, but expects to recognize substantially all of its leases on the balance sheet as of December 30, 2018 (day one of fiscal year 2019, which is the Company’s adoption date) by recording a right-of-use asset and a corresponding lease liability. The Company will adopt this standard using a modified retrospective transition approach to be applied to leases existing as of or entered into after the adoption date.

BUSINESS ACQUISITIONS AND DIVESTITURE

9 Months Ended

Sep. 29, 2018

Business Combinations [Abstract]

BUSINESS ACQUISITIONS AND DIVESTITURE

MPI Research

On April 3, 2018, the Company acquired MPI Research, a non-clinical contract research organization (CRO) providing comprehensive testing services to biopharmaceutical and medical device companies worldwide. The acquisition enhances the Company’s position as a leading global early-stage CRO by strengthening its ability to partner with clients across the drug discovery and development continuum. The purchase price for MPI Research was $829.7 million in cash, subject to certain post-closing adjustments that may change the purchase price. The acquisition was funded by borrowings on the Company’s $2.3B Credit Facility as well as the issuance of the Company’s Senior Notes. See Note 9, “Long-Term Debt and Capital Lease Obligations.” This business is reported as part of the Company’s DSA reportable segment.

The preliminary purchase allocation of $800.8 million, net of $27.7 million of cash acquired and a final net working capital adjustment of $1.2 million, was as follows:



	April 3, 2018
	(in thousands)
Trade receivables (contractual amount of $35,073)	$	35,073
Inventories	4,463
Other current assets (excluding cash)	5,893
Property, plant and equipment	128,403
Goodwill	440,662
Definite-lived intangible assets	309,200
Other long-term assets	1,081
Deferred revenue	(22,600		)
Current liabilities	(32,885		)
Deferred tax liabilities	(66,277		)
Other long-term liabilities	(2,213		)
Total purchase price allocation	$	800,800

The purchase price allocation is subject to change as additional information becomes available concerning the fair value and tax basis of the assets acquired and liabilities assumed, including certain contracts and obligations. Any additional adjustments to the purchase price allocation will be made as soon as practicable but no later than one year from the date of acquisition. From the date of the acquisition through September 29, 2018, the Company recorded measurement-period adjustments related to the acquisition that resulted in an immaterial change to the purchase price allocation on a consolidated basis.

The breakout of definite-lived intangible assets acquired was as follows:



	Definite-Lived Intangible Assets		Weighted Average Amortization Life
	(in thousands)		(in years)
Client relationships	$	264,900	13
Developed technology	23,400		3
Backlog	20,900		2
Total definite-lived intangible assets	$	309,200	12

The goodwill resulting from the transaction, $4.1 million of which is deductible for tax purposes due to a prior asset acquisition, is primarily attributable to the potential growth of the Company’s DSA business from customers introduced through MPI Research and the assembled workforce of the acquired business.

The Company incurred transaction and integration costs in connection with the acquisition of $0.8 million and $15.3 million for the three and nine months ended September 29, 2018, respectively, which were primarily included in Selling, general and administrative expenses.

MPI Research revenue for the three and nine months ended September 29, 2018 was $70.2 million and $136.8 million, respectively. MPI Research operating income for the three and nine months ended September 29, 2018 was $12.2 million and $20.4 million, respectively.

The following selected pro forma consolidated results of operations are presented as if the MPI Research acquisition had occurred as of the beginning of the period immediately preceding the period of acquisition after giving effect to certain adjustments. For the nine months ended September 29, 2018, these adjustments included additional amortization of intangible assets and depreciation of fixed assets of $11.8 million, additional interest expense on borrowings of $2.8 million, elimination of intercompany activity and other one-time costs, and the tax impacts of these adjustments. For the nine months ended September 30, 2017, these adjustments included additional amortization of intangible assets and depreciation of fixed assets of $17.3 million, additional interest expense on borrowings of $19.3 million, elimination of intercompany activity and other one-time costs, and the tax impacts of these adjustments.



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
Revenue	$	585,295	$	523,948	$	1,726,683	$	1,555,146
Net income attributable to common shareholders	59,297		48,927		168,872		139,258
Earnings per common share
Basic	$	1.23	$	1.03	$	3.51	$	2.93
Diluted	$	1.20	$	1.01	$	3.44	$	2.87

These pro forma results of operations have been prepared for comparative purposes only, and they do not purport to be indicative of the results of operations that actually would have resulted had the acquisition occurred on the dates indicated or that may result in the future. No effect has been given for synergies, if any, that may be realized through the acquisition.

KWS BioTest Limited

On January 11, 2018, the Company acquired KWS BioTest Limited (KWS BioTest), a CRO specializing in in vitro and in vivo discovery testing services for immuno-oncology, inflammatory and infectious diseases. The acquisition enhances the Company’s discovery expertise, with complementary offerings that provide the Company’s customers with additional tools in the active therapeutic research areas of oncology and immunology. The purchase price for KWS BioTest was $20.3 million in cash, subject to certain post-closing adjustments that may change the purchase price, and was funded by the Company’s various borrowings. In addition to the initial purchase price, the transaction includes aggregate, undiscounted contingent payments of up to £3.0 million (approximately $3.9 million based on recent exchange rates), based on future performance. During the three months ended September 29, 2018, the terms of these contingent payments were amended, resulting in a fixed payment of £2.0 million (approximately $2.6 million based on recent exchange rates), due in the first quarter of fiscal year 2019. The KWS BioTest business is reported as part of the Company’s DSA reportable segment.

The preliminary purchase price allocation of $21.5 million, net of $1.0 million of cash acquired and a final net working capital adjustment of $0.4 million, was as follows:



	January 11, 2018
	(in thousands)
Trade receivables (contractual amount of $1,309)	$	1,309
Other current assets (excluding cash)	99
Property, plant and equipment	1,136
Definite-lived intangible assets - client relationships	3,647
Goodwill	17,660
Current liabilities	(1,575		)
Deferred revenue	(151		)
Long-term liabilities	(596		)
Total purchase price allocation	$	21,529

The only definite-lived intangible asset relates to client relationships, which will be amortized over a weighted average life of 12 years.

The goodwill resulting from the transaction is primarily attributable to the potential growth of the Company’s DSA business from customers introduced through KWS BioTest and the assembled workforce of the acquired business. The goodwill attributable to KWS BioTest is not deductible for tax purposes.

The Company incurred transaction and integration costs of $0.1 million and $0.6 million in connection with the acquisition for the three and nine months ended September 29, 2018, respectively, which were included in Selling, general and administrative expenses, within the unaudited condensed consolidated statements of income.

Pro forma financial information as well as actual revenue and operating income have not been included because KWS BioTest’s financial results are not significant when compared to the Company’s consolidated financial results.

Brains On-Line

On August 4, 2017, the Company acquired Brains On-Line, a CRO providing critical data that advances novel therapeutics for the treatment of central nervous system (CNS) diseases. Brains On-Line strategically expands the Company’s existing CNS capabilities and establishes the Company as a single-source provider for a broad portfolio of discovery CNS services. The purchase price for Brains On-Line was $21.3 million in cash and was funded by the Company’s various borrowings. In addition to the initial purchase price, the transaction includes aggregate, undiscounted contingent payments of up to €6.7 million (approximately $7.8 million based on recent exchange rates), based on future performance. The Brains On-Line business is reported as part of the Company’s DSA reportable segment.

The contingent payments become payable based on the achievement of certain revenue and earnings targets. If achieved, the payments become due in the first quarter of fiscal year 2019. The Company estimated the fair value of this contingent consideration based on a probability-weighted set of outcomes.

The purchase price allocation of $20.1 million, net of $0.6 million of cash acquired, was as follows:



	August 4, 2017
	(in thousands)
Trade receivables (contractual amount of $1,146)	$	1,146
Other current assets (excluding cash)	640
Property, plant and equipment	664
Other long-term assets	29
Definite-lived intangible assets	9,300
Goodwill	12,582
Current liabilities	(1,683		)
Deferred revenue	(405		)
Long-term liabilities	(2,151		)
Total purchase price allocation	$	20,122

From the date of acquisition through June 30, 2018, the Company recorded measurement-period adjustments related to the acquisition that resulted in an immaterial change to the purchase price allocation on a consolidated basis. No further adjustments will be made to the purchase price allocation.

The breakout of definite-lived intangible assets acquired was as follows:



	Definite-Lived Intangible Assets		Weighted Average Amortization Life
	(in thousands)		(in years)
Client relationships	$	7,000	13
Other intangible assets	2,300		10
Total definite-lived intangible assets	$	9,300	12

The goodwill resulting from the transaction is primarily attributable to the potential growth of the Company’s DSA business from customers and technology introduced through Brains On-Line and the assembled workforce of the acquired business. The goodwill attributable to Brains On-Line is not deductible for tax purposes.

No significant integration costs were incurred in connection with the acquisition for the three and nine months ended September 29, 2018. The Company incurred transaction and integration costs in connection with the acquisition of $1.2 million and $2.1 million for the three and nine months ended September 30, 2017, respectively, which were included in Selling, general and administrative expenses, within the unaudited condensed consolidated statements of income.

Pro forma financial information as well as actual revenue and operating income have not been included because Brains On-Line’s financial results are not significant when compared to the Company’s consolidated financial results.

Contract Manufacturing

On February 10, 2017, the Company sold its CDMO business to Quotient Clinical Ltd., based in London, England, for $75.0 million in proceeds, net of $0.6 million in cash and cash equivalents transferred in conjunction with the sale and $0.3 million of working capital adjustments.

The CDMO business was acquired in April 2016 as part of the acquisition of WIL Research and was reported in the Company’s Manufacturing reportable segment. The Company determined that the CDMO business was not optimized within the Company’s portfolio at its current scale, and that the capital could be better deployed in other long-term growth opportunities.

During the three months ended April 1, 2017, the Company recorded a gain on the divestiture of the CDMO business of $10.6 million, which was included in Other income, net within the Company’s unaudited condensed consolidated statements of income. The carrying amounts of the major classes of assets and liabilities associated with the divestiture of the CDMO business were as follows:



	February 10, 2017
Assets	(in thousands)
Current assets	$	5,505
Property, plant and equipment, net	11,174
Goodwill	35,857
Long-term assets	17,154
Total assets	$	69,690
Liabilities
Deferred revenue	$	4,878
Other current liabilities	1,158
Total liabilities	$	6,036

REVENUE FROM CONTRACTS WITH CUSTOMERS

9 Months Ended

Sep. 29, 2018

Revenue from Contract with Customer [Abstract]

REVENUE FROM CONTRACTS WITH CUSTOMERS

Adoption of ASC Topic 606, “Revenue from Contracts with Customers” (ASC 606)

ASC 606 became effective for the Company on December 31, 2017 and was adopted using the modified retrospective method for all contracts not completed as of the date of adoption. For contracts that were modified before the effective date, the Company reflected the aggregate effect of all modifications when identifying performance obligations and allocating transaction price in accordance with the practical expedient, which did not have a material effect on the cumulative impact of adopting ASC 606. The reported results for 2018 reflect the application of ASC 606 guidance while the historical results for 2017 were prepared under the guidance of ASC 605, “Revenue Recognition” (ASC 605).

The cumulative effect of applying ASC 606 to all contracts with customers that were not completed as of December 30, 2017 was immaterial. There is no material difference in the reporting of revenue for the three and nine months ended September 29, 2018 in accordance with ASC 606 when compared to ASC 605.

Revenue Recognition

Revenue is recognized when, or as, obligations under the terms of a contract are satisfied, which occurs when control of the promised products or services is transferred to customers. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products or services to a customer (“transaction price”).

To the extent the transaction price includes variable consideration, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing the amount to which the Company expects to be entitled. Variable consideration is included in the transaction price if, in the Company’s judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of the Company’s anticipated performance and all information (historical, current and forecasted) that is reasonably available. Sales, value add, and other taxes collected on behalf of third parties are excluded from revenue.

When determining the transaction price of a contract, an adjustment is made if payment from a customer occurs either significantly before or significantly after performance, resulting in a significant financing component. Generally, the Company does not extend payment terms beyond one year. Applying the practical expedient, the Company does not assess whether a significant financing component exists if the period between when the Company performs its obligations under the contract and when the customer pays is one year or less. None of the Company’s contracts contained a significant financing component for the nine months ended September 29, 2018.

Contracts with customers may contain multiple performance obligations. For such arrangements, the transaction price is allocated to each performance obligation based on the estimated relative standalone selling prices of the promised products or services underlying each performance obligation. The Company determines standalone selling prices based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, the Company estimates the standalone selling price taking into account available information such as market conditions and internally approved pricing guidelines related to the performance obligations.

Contracts are often modified to account for changes in contract specifications and requirements. Contract modifications exist when the modification either creates new, or changes existing, enforceable rights and obligations. Generally, when contract modifications create new performance obligations, the modification is considered to be a separate contract and revenue is recognized prospectively. When contract modifications change existing performance obligations, the existing transaction price and measure of progress for the performance obligation to which it relates is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis.

Product revenue is generally recognized when the customer obtains control of the Company’s product, which occurs at a point in time, and may be upon shipment or upon delivery based on the contractual shipping terms of a contract. Service revenue is generally recognized over time as the services are delivered to the customer based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. Depending on which better depicts the transfer of value to the customer, the Company generally measures its progress using either cost-to-cost (input method) or right-to-invoice (output method). The Company uses the cost-to-cost measure of progress when it best depicts the transfer of value to the customer which occurs as the Company incurs costs on its contract, generally related to fixed fee service contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. The costs calculation includes variables such as labor hours, allocation of overhead costs, research model costs, and subcontractor costs. Revenue is recorded proportionally as costs are incurred. The right-to-invoice measure of progress is generally related to rate per unit contracts, as the extent of progress towards completion is measured based on discrete service or time-based increments, such as samples tested or labor hours incurred. Revenue is recorded in the amount invoiced since that amount corresponds directly to the value of the Company’s performance to date.

Disaggregation of Revenue

The following tables disaggregate the Company’s revenue by major business line and timing of transfer of products or services for the three and nine months ended September 29, 2018 (in thousands):



Major Products/Service Lines:	Three Months Ended September 29, 2018		Nine Months Ended September 29, 2018
RMS	$	126,811	$	391,195
DSA	352,257		958,665
Manufacturing	106,227		314,706
Total revenue	$	585,295	$	1,664,566



Timing of Revenue Recognition:	Three Months Ended September 29, 2018		Nine Months Ended September 29, 2018
RMS
Services and products transferred over time	$	49,417	$	146,947
Services and products transferred at a point in time	77,394		244,248
DSA
Services and products transferred over time	352,203		958,174
Services and products transferred at a point in time	54		491
Manufacturing
Services and products transferred over time	31,420		92,978
Services and products transferred at a point in time	74,807		221,728
Total revenue	$	585,295	$	1,664,566

RMS

The RMS business generates revenue through the commercial production and sale of research models and the provision of services related to the maintenance and monitoring of research models and management of clients’ research operations. Revenue from the sale of research models is recognized at a point in time when the customer obtains control of the product, which may be upon shipment or upon delivery based on the shipping terms of a contract. Revenue generated from research models services is recognized over time and is typically based on a right-to-invoice measure of progress (output method) as invoiced amounts correspond directly to the value of the Company’s performance to date.

DSA

The Discovery and Safety Assessment business provides a full suite of integrated drug discovery services directed at the identification, screening and selection of a lead compound for drug development and offers a full range of safety assessment services including bioanalysis, drug metabolism, pharmacokinetics, toxicology and pathology. Discovery and Safety Assessment services revenue is generally recognized over time using the cost-to-cost or right to invoice measures of progress, primarily representing fixed fee service contracts and per unit service contracts, respectively.

Manufacturing

The Manufacturing business includes Microbial Solutions, which provides in vitro (non-animal) lot-release testing products, microbial detection products, and species identification services; Biologics Testing Services (Biologics), which performs specialized testing of biologics; and Avian Vaccine Services (Avian), which supplies specific-pathogen-free chicken eggs and chickens. Species identification service revenue is generally recognized at a point in time as identifications are completed by the Company. Biologics service revenue is generally recognized over time using the cost-to-cost measure of progress. Microbial Solutions and Avian product sales are generally recognized at a point in time when the customer obtains control of the product, which may be upon shipment or upon delivery based on the contractual shipping terms of a contract.

Transaction Price Allocated to Future Performance Obligations

ASC 606 requires that the Company disclose the aggregate amount of transaction price that is allocated to performance obligations that have not yet been satisfied as of September 29, 2018. The guidance provides certain practical expedients that limit this requirement and, therefore, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which revenue is recognized at the amount to which the Company has the right to invoice for services performed.

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially satisfied) as of September 29, 2018:



	Revenue Expected to be Recognized in Future Periods
	Less than 1 Year		1 to 3 Years		4 to 5 Years		Beyond 5 Years		Total
	(in thousands)
DSA	$	126,336	$	82,192	$	3,299	$	492	$	212,319
Manufacturing	10,286		20,245		9,013		68		39,612
Total	$	136,622	$	102,437	$	12,312	$	560	$	251,931

Contract Balances from Contracts with Customers

The timing of revenue recognition, billings and cash collections results in billed receivables (client receivables), contract assets (unbilled revenue), contract liabilities (current and non-current deferred revenue), and customer deposits on the unaudited condensed consolidated balance sheets. The Company’s payment terms are generally 30 days in the United States and consistent with prevailing practice in international markets. A contract asset is recorded when a right to consideration in exchange for goods or services transferred to a customer is conditioned other than the passage of time. Client receivables are recorded separately from contract assets since only the passage of time is required before consideration is due. A contract liability is recorded when consideration is received, or such consideration is unconditionally due, from a customer prior to transferring goods or services to the customer under the terms of a contract. Contract liabilities are recognized as revenue after control of the products or services is transferred to the customer and all revenue recognition criteria have been met. The following table provides information about client receivables, contract assets, and contract liabilities from contracts with customers:



	September 29, 2018		December 30, 2017 ⁽¹⁾
	(in thousands)
Balances from contracts with customers only:
Client receivables	$	376,302	$	335,839
Contract assets (unbilled revenue)	113,311		96,297
Contract liabilities (current and long-term deferred revenue)	178,331		125,882
Contract liabilities (customer contract deposits)	44,586		—
⁽¹⁾ The beginning balance as of December 30, 2017 is presented under the guidance of ASC 605.

Under ASC 606, when the Company does not have the unconditional right to advanced billings, both advanced client payments and unpaid advanced client billings are excluded from deferred revenue, with the advanced billings also being excluded from client receivables. As of September 29, 2018, the Company excluded approximately $16 million of unpaid advanced client billings from both client receivables and deferred revenue and approximately $45 million of advanced client payments have been presented as customer contract deposits within other current liabilities in the accompanying unaudited condensed consolidated financial statements.

Other changes in the contract asset and the contract liability balances during the nine months ended September 29, 2018 were as follows:

(i) Changes due to business combinations:

See Note 2. “Business Acquisitions and Divestiture” for client receivables and deferred revenue that were acquired as part of the MPI Research acquisition occurring on April 3, 2018 and the KWS BioTest acquisition occurring on January 11, 2018.

(ii) Cumulative catch-up adjustments to revenue that affect the corresponding contract asset or contract liability, including adjustments arising from a change in the measure of progress, a change in an estimate of the transaction price (including any changes in the assessment of whether an estimate of variable consideration is constrained), or a contract modification:

During the nine months ended September 29, 2018, an immaterial cumulative catch-up adjustment to revenue was recorded.

(iii) A change in the time frame for a right to consideration to become unconditional (that is, for a contract asset to be recorded as a client receivable):

Approximately $88 million of unbilled revenue as of December 30, 2017 was billed during the nine months ended September 29, 2018.

(iv) A change in the time frame for a performance obligation to be satisfied (that is, for the recognition of revenue arising from a contract liability):

Approximately $110 million of contract liabilities as of December 30, 2017 were recognized as revenue during the nine months ended September 29, 2018.

SEGMENT INFORMATION

9 Months Ended

Sep. 29, 2018

Segment Reporting [Abstract]

SEGMENT INFORMATION

The Company retrospectively adopted ASU 2017-07 in fiscal year 2018, which impacted segment information. Service cost is reflected in operating income within the unaudited condensed consolidated statements of income while all other components of net periodic cost are recorded in Other income, net within the unaudited condensed consolidated statements of income. See Note 1, “Basis of Presentation.” The Company’s three reportable segments are Research Models and Services (RMS), Discovery and Safety Assessment (DSA), and Manufacturing Support (Manufacturing).

The following table presents revenue and other financial information by reportable segment:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
RMS
Revenue	$	126,811	$	122,020	$	391,195	$	373,183
Operating income	32,121		30,665		104,893		101,949
Depreciation and amortization	4,811		5,272		14,565		15,309
Capital expenditures	8,166		6,762		18,105		13,769
DSA
Revenue	$	352,257	$	246,946	$	958,665	$	726,796
Operating income	62,909		46,324		160,391		135,994
Depreciation and amortization	31,433		20,333		83,262		58,667
Capital expenditures	10,800		10,127		34,496		25,552
Manufacturing
Revenue	$	106,227	$	95,266	$	314,706	$	279,145
Operating income	33,266		31,920		95,904		87,563
Depreciation and amortization	5,709		5,572		17,313		17,321
Capital expenditures	2,709		2,879		12,731		7,111

For the three and nine months ended September 29, 2018 and September 30, 2017, reconciliations of segment operating income, depreciation and amortization, and capital expenditures to the respective consolidated amounts are as follows:



	Operating Income						Depreciation and Amortization				Capital Expenditures
	September 29, 2018			September 30, 2017			September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
Three Months Ended:
Total reportable segments	$	128,296		$	108,909		$	41,953	$	31,177	$	21,675	$	19,768
Unallocated corporate	(43,934		)	(34,847		)	1,639		2,288		764		2,243
Total consolidated	$	84,362		$	74,062		$	43,592	$	33,465	$	22,439	$	22,011



Nine Months Ended:
Total reportable segments	$	361,188		$	325,506		$	115,140	$	91,297	$	65,332	$	46,432
Unallocated corporate	(132,287		)	(100,052		)	5,058		6,378		6,046		7,496
Total consolidated	$	228,901		$	225,454		$	120,198	$	97,675	$	71,378	$	53,928

Revenue for each significant product or service offering is as follows:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
RMS	$	126,811	$	122,020	$	391,195	$	373,183
DSA	352,257		246,946		958,665		726,796
Manufacturing	106,227		95,266		314,706		279,145
Total revenue	$	585,295	$	464,232	$	1,664,566	$	1,379,124

A summary of unallocated corporate expense consists of the following:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
Stock-based compensation	$	7,910	$	7,255	$	24,517	$	20,259
Compensation, benefits, and other employee-related expenses	20,464		11,337		56,375		36,083
External consulting and other service expenses	4,767		6,729		12,711		16,581
Information technology	3,070		3,237		8,723		9,247
Depreciation	1,639		2,288		5,058		6,378
Acquisition and integration	1,122		1,327		15,678		2,539
Other general unallocated corporate	4,962		2,674		9,225		8,965
Total unallocated corporate expense	$	43,934	$	34,847	$	132,287	$	100,052

Other general unallocated corporate expense consists of costs associated with departments such as senior executives, corporate accounting, legal, tax, human resources, treasury, and investor relations.

Revenue by geographic area is as follows:



	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)
Three Months Ended:
September 29, 2018	$	336,811	$	159,473	$	53,665	$	34,062	$	1,284	$	585,295
September 30, 2017	238,226		141,967		51,864		31,953		222		464,232
Nine Months Ended:
September 29, 2018	$	919,807	$	481,955	$	153,802	$	104,817	$	4,185	$	1,664,566
September 30, 2017	714,460		418,468		152,293		93,094		809		1,379,124

Included in the Asia Pacific category above are operations located in China, Japan, Korea, Australia, Singapore, and India. Included in the Other category above are operations located in Brazil and Israel. Revenue represents sales originating in entities physically located in the identified geographic area.

SUPPLEMENTAL BALANCE SHEET INFORMATION

9 Months Ended

Sep. 29, 2018

Supplemental Balance Sheet Information [Abstract]

SUPPLEMENTAL BALANCE SHEET INFORMATION

The composition of trade receivables, net is as follows:



	September 29, 2018			December 30, 2017
	(in thousands)
Client receivables	$	376,302		$	335,839
Unbilled revenue	113,311			96,297
Total	489,613			432,136
Less: Allowance for doubtful accounts	(2,274		)	(2,120		)
Trade receivables, net	$	487,339		$	430,016

The composition of inventories is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
Raw materials and supplies	$	20,798	$	19,858
Work in process	20,231		18,200
Finished products	84,471		76,898
Inventories	$	125,500	$	114,956

The composition of other current assets is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
Investments	$	5,238	$	28,489
Prepaid income taxes	36,733		52,234
Restricted cash	426		592
Other	300		—
Other current assets	$	42,697	$	81,315

The composition of other assets is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
Life insurance policies	$	35,916	$	34,008
Venture capital investments	95,837		71,101
Restricted cash	2,584		1,945
Other	20,258		16,948
Other assets	$	154,595	$	124,002

The composition of other current liabilities is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
Accrued income taxes	$	21,387	$	43,250
Customer contract deposits	44,586		—
Other	938		1,210
Other current liabilities	$	66,911	$	44,460

The composition of other long-term liabilities is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
U.S. Transition Tax	$	52,070	$	61,038
Long-term pension liability	20,231		52,364
Accrued executive supplemental life insurance retirement plan and deferred compensation plan	38,610		37,582
Long-term deferred revenue	37,571		8,313
Other	36,472		35,518
Other long-term liabilities	$	184,954	$	194,815

VENTURE CAPITAL INVESTMENTS	9 Months Ended
VENTURE CAPITAL INVESTMENTS	Sep. 29, 2018
Equity Method Investments and Joint Ventures [Abstract]
VENTURE CAPITAL INVESTMENTS	VENTURE CAPITAL INVESTMENTS The Company invests in several venture capital funds that invest in start-up companies, primarily in the life sciences industry. The Company’s ownership interest in these funds ranges from less than 1% to 12.0%. The Company accounts for the investments in limited partnerships (LPs), which are variable interest entities, under the equity method of accounting. For publicly-held investments in the LPs, the Company adjusts for changes in fair market value based on reported share holdings at the end of each fiscal quarter. The Company is not the primary beneficiary because it has no power to direct the activities that most significantly affect the LPs’ economic performance. The Company accounts for the investments in limited liability companies, which are not variable interest entities, under the equity method of accounting. The Company’s total commitment to the venture capital funds as of September 29, 2018 was $114.9 million, of which the Company funded $65.3 million through that date. The Company received dividends totaling $5.6 million and $3.3 million for the three months ended September 29, 2018 and September 30, 2017, respectively. The Company received dividends totaling $14.1 million and $7.7 million for the nine months ended September 29, 2018 and September 30, 2017, respectively. The Company recognized gains of $5.4 million and $5.6 million related to the venture capital investments for the three months ended September 29, 2018 and September 30, 2017, respectively. The Company recognized gains of $22.8 million and $12.3 million related to the venture capital investments for the nine months ended September 29, 2018 and September 30, 2017, respectively. Gains and losses are recorded in Other income, net in the accompanying unaudited condensed consolidated statements of income.

FAIR VALUE

9 Months Ended

Sep. 29, 2018

Fair Value Disclosures [Abstract]

FAIR VALUE

The Company has certain assets and liabilities recorded at fair value, which have been classified as Level 1, 2, or 3 within the fair value hierarchy:


•	Level 1 - Fair values are determined utilizing prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access,


•	Level 2 - Fair values are determined by utilizing quoted prices for identical or similar assets and liabilities in active markets or other market observable inputs such as interest rates, yield curves, and foreign currency spot rates,


•	Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.

The fair value hierarchy level is determined by asset and liability class based on the lowest level of significant input. The observability of inputs may change for certain assets or liabilities. This condition could cause an asset or liability to be reclassified between levels. The Company recognizes transfers between levels within the fair value hierarchy, if any, at the end of each quarter. During the nine months ended September 29, 2018 and September 30, 2017, there were no transfers between levels.

Valuation methodologies used for assets and liabilities measured or disclosed at fair value are as follows:


•	Cash equivalents - Valued at market prices determined through third-party pricing services;


•	Mutual funds - Valued at the unadjusted quoted net asset value of shares held by the Company;


•	Foreign currency forward contracts - Valued using market observable inputs, such as forward foreign exchange points and foreign exchanges rates;


•	Life insurance policies - Valued at cash surrender value based on the fair value of underlying investments;

•

Debt instruments - The book value of the Company’s term and revolving loans, which are variable rate loans carried at amortized cost, approximates the fair value based on current market pricing of similar debt. The book value of the Company’s 5.5% Senior Notes (Senior Notes) due in 2026, which are fixed rate debt carried at amortized cost, approximates fair value based on quoted market prices and on borrowing rates available to the Company; and


•	Contingent consideration - Valued based on a probability weighting of the future cash flows associated with the potential outcomes.

Assets and liabilities measured at fair value on a recurring basis are summarized below:



	September 29, 2018
	Level 1		Level 2		Level 3		Total
	(in thousands)
Cash equivalents	$	—	$	18,717	$	—	$	18,717
Other current assets:
Foreign currency forward contract			29				29
Other assets:
Life insurance policies	—		28,193		—		28,193
Total assets measured at fair value	$	—	$	46,939	$	—	$	46,939

Other current liabilities:
Contingent consideration	$	—	$	—	$	3,400	$	3,400
Total liabilities measured at fair value	$	—	$	—	$	3,400	$	3,400



	December 30, 2017
	Level 1		Level 2		Level 3		Total
	(in thousands)
Cash equivalents	$	—	$	21	$	—	$	21
Other assets:
Life insurance policies	—		26,358		—		26,358
Total assets measured at fair value	$	—	$	26,379	$	—	$	26,379

Other current liabilities:
Contingent consideration	$	—	$	—	$	298	$	298
Total liabilities measured at fair value	$	—	$	—	$	298	$	298

Contingent Consideration

The following table provides a rollforward of the contingent consideration related to previous business acquisitions. See Note 2, “Business Acquisitions and Divestiture.”



	Nine Months Ended
	September 29, 2018			September 30, 2017
	(in thousands)
Beginning balance	$	298		$	3,621
Additions	3,315			296
Payments	—			(3,606		)
Foreign currency translation	(213		)	—
Reversal of previously recorded contingent liability	—			(15		)
Ending balance	$	3,400		$	296

The unobservable inputs used in the fair value measurement of the Company’s contingent consideration are the probabilities of successful achievement of certain financial targets and a discount rate. Increases or decreases in any of the probabilities of success would result in a higher or lower fair value measurement, respectively. Increases or decreases in the discount rate would result in a lower or higher fair value measurement, respectively.

Debt Instruments

The book value of the Company’s term and revolving loans, which are variable rate loans carried at amortized cost, approximates the fair value based on current market pricing of similar debt. As the fair value is based on significant other observable inputs, including current interest and foreign currency exchange rates, it is deemed to be Level 2 within the fair value hierarchy.

The book value of the Company’s Senior Notes, which are a fixed rate obligation carried at amortized cost, approximates the fair value at quoted market prices as well as borrowing rates available to the Company. As the fair value is based on significant other observable outputs, it is deemed to be Level 2 within the fair value hierarchy.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

GOODWILL AND INTANGIBLE ASSETS

9 Months Ended

Sep. 29, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

Goodwill

The following table provides a rollforward of the Company’s goodwill:



			Adjustments to Goodwill
	December 30, 2017		Acquisitions		Foreign Exchange			September 29, 2018
	(in thousands)
RMS	$	58,122	$	—	$	(1,059	)	$	57,063
DSA	605,176		459,228		(9,428		)	1,054,976
Manufacturing	141,608		2,551		(3,498		)	140,661
Goodwill	$	804,906	$	461,779	$	(13,985	)	$	1,252,700

The increase in goodwill during the nine months ended September 29, 2018 related primarily to the acquisitions of MPI Research and KWS BioTest in the DSA reportable segment, an immaterial acquisition of an Australian business in the Manufacturing reportable segment, and the impact of foreign exchange.

Intangible Assets, Net

The following table displays intangible assets, net by major class:



	September 29, 2018							December 30, 2017
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(in thousands)
Backlog	$	20,900	$	(12,391	)	$	8,509	$	8,111	$	(8,111	)	$	—
Technology	102,794		(39,271		)	63,523		81,309		(27,157		)	54,152
Trademarks and trade names	8,466		(4,619		)	3,847		8,661		(4,562		)	4,099
Other	17,532		(9,477		)	8,055		17,465		(7,845		)	9,620
Other intangible assets	149,692		(65,758		)	83,934		115,546		(47,675		)	67,871
Client relationships	798,574		(252,775		)	545,799		540,425		(238,534		)	301,891
Intangible assets	$	948,266	$	(318,533	)	$	629,733	$	655,971	$	(286,209	)	$	369,762

The increase in intangible assets, net during the nine months ended September 29, 2018 related primarily to the acquisitions of MPI Research and KWS BioTest in the DSA reportable segment.

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS

9 Months Ended

Sep. 29, 2018

Debt Disclosure [Abstract]

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS

Long-Term Debt

Long-term debt, net consists of the following:



	September 29, 2018			December 30, 2017
	(in thousands)
Term loans	$	740,625		$	601,250
Revolving facility	411,931			500,997
Senior Notes	500,000			—
Other long-term debt	18,091			18,292
Total debt	1,670,647			1,120,539
Less: Current portion of long-term debt	(28,229		)	(28,546		)
Long-term debt	1,642,418			1,091,993
Debt discount and debt issuance costs	(17,068		)	(5,770		)
Long-term debt, net	$	1,625,350		$	1,086,223

As of September 29, 2018 and December 30, 2017, the weighted average interest rate on the Company’s debt was 3.72% and 2.45%, respectively.

Term Loans and Revolving Facility

On March 26, 2018, the Company amended and restated its credit facility creating a $2.3 billion credit facility ($2.3B Credit Facility) which extends the maturity date for the credit facility. The $2.3B Credit Facility provides for a $750.0 million term loan and a $1.55 billion multi-currency revolving facility. The amendment was accounted for as a debt modification. In connection with the transaction, the Company capitalized approximately $6.2 million within Long-term debt, net and capital leases in the accompanying unaudited condensed consolidated balance sheets and expensed approximately $1.0 million of debt issuance costs recorded within Interest expense in the accompanying unaudited condensed consolidated statements of income.

The term loan facility matures in 19 quarterly installments with the last installment due March 26, 2023. The revolving facility matures on March 26, 2023, and requires no scheduled payment before that date. Under specified circumstances, the Company has the ability to increase the term loan and/or revolving facility by up to $1.0 billion in the aggregate.

The interest rates applicable to the term loan and revolving facility under the $2.3B Credit Facility are, at the Company’s option, equal to either the base rate (which is the higher of (1) the prime rate, (2) the federal funds rate plus 0.50%, or (3) the one-month adjusted LIBOR rate plus 1.0%) or the adjusted LIBOR rate, plus an interest rate margin based upon the Company’s leverage ratio.

The $2.3B Credit Facility includes certain customary representations and warranties, events of default, notices of material adverse changes to the Company’s business and negative and affirmative covenants. These covenants include (1) maintenance of a ratio of consolidated earnings before interest, taxes, depreciation and amortization (EBITDA) less capital expenditures to consolidated cash interest expense, for any period of four consecutive fiscal quarters, of no less than 3.50 to 1.0 as well as (2) maintenance of a ratio of consolidated indebtedness to consolidated EBITDA for any period of four consecutive fiscal quarters, of no more than 4.50 to 1.0 with step downs to 3.50 to 1.0 by the last day of the first quarter of 2020. As of September 29, 2018, the Company was compliant with all covenants.

The obligations of the Company under the $2.3B Credit Facility are collateralized by substantially all of the assets of the Company.

Senior Notes Offering

On April 3, 2018, the Company entered into an indenture (Indenture) with MUFG Union Bank, N.A., (Trustee) in connection with the offering of $500.0 million in aggregate principal amount of the Company’s 5.5% Senior Notes (Senior Notes), due in 2026, in an unregistered offering. Under the terms of the Indenture, interest on the Senior Notes is payable semi-annually on April 1 and October 1 of each year, beginning on October 1, 2018. The Senior Notes are guaranteed fully and unconditionally, jointly and severally on a senior unsecured basis (Note Guarantees) by the Company and certain of its U.S. subsidiaries. In connection with the transaction, the Company incurred approximately $7.4 million of debt issuance costs within Long-term debt, net and capital leases in the accompanying unaudited condensed consolidated balance sheets.

The Company may redeem all or part of the Senior Notes at any time prior to April 1, 2021, at its option, at a redemption price equal to 100% of the principal amount of such Senior Notes plus the Applicable Premium (as defined in the Indenture). The Company may also redeem up to 40% of the Senior Notes with the proceeds of certain equity offerings completed before April 1, 2021, at a redemption price equal to 105.5% of the principal amount of such Senior Notes. On or after April 1, 2021, the Company may on any one or more occasions redeem all or a part of the Senior Notes, at the redemption prices specified in the Indenture based on the applicable date of redemption. Upon the occurrence of a Change of Control Triggering Event (as defined in the Indenture), the Company will be required to offer to repurchase the Senior Notes at a purchase price equal to 101% of the aggregate principal amount of such Senior Notes. Any redemption of the Senior Notes would also require settlement of accrued and unpaid interest, if any, to but excluding the redemption date.

The Indenture contains certain covenants, including but not limited to, limitations and restrictions on the ability of the Company and its U.S. subsidiaries to (i) create certain liens, (ii) enter into any Sale and Leaseback Transaction (as defined in the Indenture) with respect to any property, and (iii) merge, consolidate, sell or otherwise dispose of all or substantially all of their assets. These covenants are subject to a number of conditions, qualifications, exceptions and limitations. Any event of default, as defined, could result in the acceleration of the repayment of the obligations.

Net proceeds from the Senior Notes of $493.8 million were used to partially repay the outstanding revolving credit facility on April 3, 2018.

Commitment Letter

On February 12, 2018, the Company secured a $830 million commitment under a 364-day senior unsecured bridge loan facility (the “Bridge Facility”) for the purpose of financing the acquisition of MPI Research. The Bridge Facility was terminated as of April 3, 2018 upon the successful acquisition of MPI Research. Debt issuance costs of $1.8 million, which were capitalized upon the execution of the Bridge Facility, were expensed upon termination of the agreement on April 3, 2018. In addition, the Company incurred and expensed $2.0 million of fees pertaining to a temporary backstop facility related to the negotiation of the Credit Facility during the three months ended March 31, 2018. These costs were included in Interest expense in the accompanying unaudited condensed consolidated statements of income.

Letters of Credit

As of September 29, 2018 and December 30, 2017, the Company had $5.5 million and $4.9 million, respectively, in outstanding letters of credit.

Capital Lease Obligations

The Company’s capital lease obligations amounted to $30.8 million and $30.3 million as of September 29, 2018 and December 30, 2017, respectively.

EQUITY AND NONCONTROLLING INTEREST

9 Months Ended

Sep. 29, 2018

Equity [Abstract]

EQUITY AND NONCONTROLLING INTEREST

EQUITY AND NONCONTROLLING INTERESTS

Earnings Per Share

The following table reconciles the numerator and denominator in the computations of basic and diluted earnings per share:



	Three Months Ended					Nine Months Ended
	September 29, 2018		September 30, 2017			September 29, 2018		September 30, 2017
	(in thousands)
Numerator:
Income from continuing operations, net of income taxes	$	60,902	$	52,994		$	167,020	$	154,630
Income (loss) from discontinued operations, net of income taxes	—		(39		)	1,506		(114		)
Less: Net income attributable to noncontrolling interests	534		481			1,818		1,312
Net income attributable to common shareholders	$	60,368	$	52,474		$	166,708	$	153,204

Denominator:
Weighted-average shares outstanding - Basic	48,310		47,451			48,098		47,530
Effect of dilutive securities:
Stock options, restricted stock units, performance share units and restricted stock	1,016		939			1,020		910
Weighted-average shares outstanding - Diluted	49,326		48,390			49,118		48,440

Options to purchase 0.5 million and 0.4 million shares for the three months ended September 29, 2018 and September 30, 2017, respectively, as well as a non-significant number of restricted shares, restricted stock units (RSUs), and performance share units (PSUs), were not included in computing diluted earnings per share because their inclusion would have been anti-dilutive. Options to purchase 0.5 million and 0.6 million shares for the nine months ended September 29, 2018 and September 30, 2017, respectively, as well as a non-significant number of restricted shares, RSUs and PSUs, were not included in computing diluted earnings per share because their inclusion would have been anti-dilutive. Basic weighted-average shares outstanding for the nine months ended September 29, 2018 and September 30, 2017 excluded the impact of 1.0 million and 1.1 million shares, respectively, of non-vested restricted stock and RSUs.

Treasury Shares

During the nine months ended September 29, 2018, the Company did not repurchase any shares under its authorized stock repurchase program. During the nine months ended September 30, 2017, the Company repurchased 1.0 million shares totaling $90.6 million under its $1.3 billion authorized stock repurchase program. As of September 29, 2018, the Company had $129.1 million remaining on the authorized stock repurchase program.

The Company’s stock-based compensation plans permit the netting of common stock upon vesting of restricted stock, RSUs, and PSUs in order to satisfy individual statutory tax withholding requirements. During the nine months ended September 29, 2018 and September 30, 2017, the Company acquired 0.1 million shares for $13.8 million and 0.2 million shares for $16.3 million, respectively, from such netting.

In October 2018, the Company’s Board of Directors approved the cancellation and return to the Company’s authorized and unissued capital stock of 40.2 million treasury shares for no consideration.

Accumulated Other Comprehensive Income (Loss)

Changes to each component of accumulated other comprehensive income (loss), net of income taxes, are as follows:



	Foreign Currency Translation Adjustment and Other			Pension and Other Post-Retirement Benefit Plans			Total
	(in thousands)
December 30, 2017	$	(77,545	)	$	(67,186	)	$	(144,731	)
Other comprehensive loss before reclassifications	(13,592		)	—			(13,592		)
Amounts reclassified from accumulated other comprehensive loss	—			1,864			1,864
Net current period other comprehensive (loss) income	(13,592		)	1,864			(11,728		)
Amount reclassified from accumulated other comprehensive loss due to adoption of ASU 2018-02 (See Note 1)	—			3,330			3,330
Income tax (benefit) expense	(801		)	460			(341		)
September 29, 2018	$	(90,336	)	$	(69,112	)	$	(159,448	)

Nonredeemable Noncontrolling Interest

The Company has an investment in an entity whose financial results are consolidated in the Company’s financial statements, as it has the ability to exercise control over this entity. The interest of the noncontrolling party in this entity has been recorded as noncontrolling interest. The activity within the nonredeemable noncontrolling interest was immaterial during the three and nine months ended September 29, 2018 and September 30, 2017.

Redeemable Noncontrolling Interest

The Company’s redeemable noncontrolling interest in Vital River is 13%.

The Company has the right to purchase, and the noncontrolling interest holders have the right to sell, the remaining 13% equity interest at a contractually defined redemption value, subject to a redemption floor (embedded derivative). These rights are exercisable beginning in 2019 and are accelerated in certain events. The redeemable noncontrolling interest is measured at the greater of the amount that would be paid if settlement occurred as of the balance sheet date based on the contractually defined redemption value ($17.3 million as of September 29, 2018) and its carrying amount adjusted for net income (loss) attributable to the noncontrolling interest. As the noncontrolling interest holders have the ability to require the Company to purchase the remaining 13% interest, the noncontrolling interest is classified in the mezzanine section of the unaudited condensed consolidated balance sheets, which is presented above the equity section and below liabilities. The agreement does not limit the amount that the Company could be required to pay to purchase the remaining 13% equity interest.

The following table provides a rollforward of the activity related to the Company’s redeemable noncontrolling interest:



	Nine Months Ended
	September 29, 2018			September 30, 2017
	(in thousands)
Beginning balance	$	16,609		$	14,659
Total gains or losses (realized/unrealized):
Net income attributable to noncontrolling interest	543			474
Adjustment to redemption value	1,111			—
Foreign currency translation	(932		)	652
Ending balance	$	17,331		$	15,785

INCOME TAXES	9 Months Ended
INCOME TAXES	Sep. 29, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company’s effective tax rates for the three months ended September 29, 2018 and September 30, 2017 were 16.9% and 27.3%, respectively. The Company’s effective tax rates for the nine months ended September 29, 2018 and September 30, 2017 were 19.2% and 32.2%, respectively. For the three months ended September 29, 2018, the decrease in the effective tax rate from the prior year period was primarily attributable to the net benefits of U.S. Tax Reform, as well as a one-time benefit under SAB 118 as discussed in the U.S. Tax Reform section below. For the nine months ended September 29, 2018, the decrease in the effective tax rate from the prior year period was primarily attributable to the items previously mentioned, as well as the tax rate impact of the $18.0 million gain on the CDMO business divestiture in the first quarter of 2017. For the three months ended September 29, 2018, the Company’s unrecognized tax benefits increased by $0.3 million to $20.1 million, primarily due to an additional quarter of Canadian Scientific Research and Experimental Development Credit reserves offset with the settlement of prior period positions with tax authorities. For the three months ended September 29, 2018, the unrecognized income tax benefits that would impact the effective tax rate increased by $0.8 million to $18.8 million, for the same reasons listed above. The accrued interest on unrecognized tax benefits was $2.8 million at September 29, 2018. The Company estimates that it is reasonably possible that the unrecognized tax benefits will decrease by up to $8.2 million over the next twelve-month period, primarily due to the outcome of pending tax audits and statute of limitation lapses. The Company continues to monitor its accounting for the elements of U.S. Tax Reform enacted in December 2017. The Company made reasonable estimates of the effects of U.S. Tax Reform to its consolidated financial statements in fiscal year 2017 based on guidance and regulations released by the Internal Revenue Service. During the three months ended September 29, 2018, the Company recorded measurement period adjustments under SAB 118 to the provisional amounts recorded in the fourth quarter of 2017 based on the filing of the Company’s 2017 U.S. federal tax return. The measurement period adjustments included a $1.0 million tax benefit relating to a decreased Transition Tax liability and a $1.8 million tax benefit for additional decreases to the net deferred tax liability relating to the reduction on the U.S. federal statutory tax rate to 21%. The Company anticipates finalizing and recording any adjustments resulting from the release of any additional guidance and interpretations by the end of its fiscal year ending December 29, 2018. The Company conducts business in a number of tax jurisdictions. As a result, it is subject to tax audits in jurisdictions including the U.S., U.K., China, France, Germany, and Canada. With few exceptions, the Company is no longer subject to U.S. and international income tax examinations for years before 2015. The Company and certain of its subsidiaries have ongoing tax controversies with various tax authorities in the U.S., Canada, Germany, France, and India. The Company does not believe that resolution of these controversies will have a material impact on its financial position or results of operations.

PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS

9 Months Ended

Sep. 29, 2018

Retirement Benefits [Abstract]

PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS

The Company retrospectively adopted ASU 2017-07 in fiscal year 2018. Service cost is reflected in Cost of services provided (excluding amortization of intangible assets) and Selling, general and administrative within the unaudited condensed consolidated statements of income. All other components of net periodic cost are recorded in Other income, net within the unaudited condensed consolidated statements of income. See Note 1, “Basis of Presentation.” The following table provides the components of net periodic cost for the Company’s pension, deferred compensation and executive supplemental life insurance retirement plans:



	Three Months Ended						Nine Months Ended
	September 29, 2018			September 30, 2017			September 29, 2018			September 30, 2017
	(in thousands)
Service cost	$	814		$	749		$	2,629		$	2,277
Interest cost	2,752			2,663			8,241			8,428
Expected return on plan assets	(3,801		)	(3,476		)	(11,690		)	(10,411		)
Amortization of prior service credit	(135		)	(134		)	(406		)	(392		)
Amortization of net loss	736			1,017			2,267			3,030
Net periodic cost	$	366		$	819		$	1,041		$	2,932

The net periodic cost for the Company’s other post-retirement benefit plan for the three and nine months ended September 29, 2018 and September 30, 2017 was not significant.

STOCK-BASED COMPENSATION

9 Months Ended

Sep. 29, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED COMPENSATION

The Company has stock-based compensation plans under which employees and non-employee directors may be granted stock-based awards such as stock options, restricted stock, RSUs, and PSUs.

The following table provides stock-based compensation by the financial statement line item in which it is reflected:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
Cost of revenue	$	1,596	$	1,700	$	4,747	$	4,989
Selling, general and administrative	10,224		9,826		31,161		27,913
Stock-based compensation	$	11,820	$	11,526	$	35,908	$	32,902

During the nine months ended September 29, 2018, the Company granted stock options representing 0.5 million common shares with a per-share weighted-average grant date fair value of $24.80, RSUs representing 0.2 million common shares with a per-share weighted-average grant date fair value of $109.15, and PSUs representing 0.2 million common shares with a per-share weighted-average grant date fair value of $117.28. The maximum number of common shares to be issued upon vesting of PSUs granted during the nine months ended September 29, 2018 is 0.4 million.

FOREIGN CURRENCY CONTRACT

9 Months Ended

Sep. 29, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

FOREIGN CURRENCY CONTRACT

The Company entered into a foreign exchange forward contract to limit its foreign currency exposure related to intercompany loans that are not of a long-term investment nature. The contract is recorded at fair value in the Company’s unaudited condensed consolidated balance sheets and is not designated as hedging instruments. Any gains or losses on such a contract is immediately recognized in Other income, net, and is largely offset by the remeasurement of the underlying intercompany loan balances.

The notional amount and fair value of the Company’s foreign currency forward contract is summarized as follows:



	Notional Amount		Fair Value		Balance Sheet Location
	(in thousands)
September 29, 2018	$	28,665	$	29	Other Current Asset

The effect of the foreign exchange forward contract related to an intercompany loan denominated in British Pounds on the Company’s unaudited condensed consolidated statements of income was immaterial for the three months ended September 29, 2018.

The forward contract outstanding as of September 29, 2018 had a duration of 1 month. The Company had no such contracts during the three months ended September 30, 2017.

COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Sep. 29, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Litigation Various lawsuits, claims and proceedings of a nature considered normal to its business are pending against the Company. While the outcome of any of these proceedings cannot be accurately predicted, the Company does not believe the ultimate resolution of any of these existing matters would have a material adverse effect on the Company’s business or financial condition. Lease Commitments During the nine months ended September 29, 2018, the Company assumed or entered into new lease agreements or exercised options to extend the lease terms for certain existing leases. As a result, the Company’s lease obligations through 2032 increased by $55.2 million during the nine months ended September 29, 2018.

RESTRUCTURING AND ASSET IMPAIRMENT

9 Months Ended

Sep. 29, 2018

Restructuring and Related Activities [Abstract]

RESTRUCTURING AND ASSET IMPAIRMENT

RESTRUCTURING AND ASSET IMPAIRMENTS

Global RMS Restructuring Initiatives

In the fourth quarter of fiscal year 2017, the Company committed to a plan to further reduce costs and improve operating efficiencies in its RMS reportable segment. The plan included ceasing production within the Company’s facility in Maryland and reducing its workforce at various global RMS facilities during 2018. On August 1, 2018, the Company’s Board of Directors approved a modification to the plan which repurposes the facility in Maryland to be used for alternative initiatives.

The following table presents a summary of severance and transition costs, and asset impairments (referred to as restructuring costs) related to this initiative within the unaudited condensed consolidated statements of income for the three and nine months ended September 29, 2018.



	Three Months Ended								Nine Months Ended
	September 29, 2018
	Severance and Transition Costs			Asset Impairments and Other Costs		Total			Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)
Cost of services provided and products sold (excluding amortization of intangible assets)	$	95		$	238	$	333		$	650	$	822	$	1,472
Selling, general and administrative	(30		)	—		(30		)	158		—		158
Total	$	65		$	238	$	303		$	808	$	822	$	1,630

Restructuring costs incurred during the fourth quarter of 2017 were $18.1 million, which primarily related to non-cash asset impairments and accelerated depreciation charges of $17.7 million. The costs incurred during the three and nine months ended September 29, 2018 were $0.3 million and $1.6 million, respectively. The remaining restructuring costs related to this initiative in 2018 are not expected to exceed $1.0 million, all of which relate to employee separation costs and other transition costs. All of the costs are recorded in the RMS reportable segment. The cash portion of the total costs are not expected to exceed $2.5 million.

Other Restructuring Initiatives

In recent fiscal years, the Company has undertaken productivity improvement initiatives within all reportable segments at various locations across the U.S., Europe, and Japan. This includes workforce right-sizing and scalability initiatives, resulting in severance and transition costs; and cost related to the consolidation of facilities, resulting in asset impairment and accelerated depreciation charges. The Company’s existing lease obligations for certain facilities continue through various dates, the latest being March 2028.

The following table presents a summary of restructuring costs related to these initiatives within the unaudited condensed consolidated statements of income for the three and nine months ended September 29, 2018 and September 30, 2017.



	Three Months Ended
	September 29, 2018						September 30, 2017
	Severance and Transition Costs		Asset Impairments and Other Costs		Total		Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)
Cost of services provided and products sold (excluding amortization of intangible assets)	$	30	$	5	$	35	$	189	$	276	$	465
Selling, general and administrative	4,619		21		4,640		447		—		447
Total	$	4,649	$	26	$	4,675	$	636	$	276	$	912



	Nine Months Ended
	September 29, 2018						September 30, 2017
	Severance and Transition Costs		Asset Impairments and Other Costs		Total		Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)
Cost of services provided and products sold (excluding amortization of intangible assets)	$	767	$	27	$	794	$	1,188	$	485	$	1,673
Selling, general and administrative	6,354		21		6,375		788		—		788
Total	$	7,121	$	48	$	7,169	$	1,976	$	485	$	2,461

The following table presents restructuring costs by reportable segment for these productivity improvement initiatives:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
DSA	$	56	$	360	$	1,021	$	841
Manufacturing	—		552		870		1,620
Unallocated corporate	4,619		—		5,278		—
Total	$	4,675	$	912	$	7,169	$	2,461

The following table provides a rollforward for all of the Company’s severance and transition costs, and lease obligation liabilities related to all restructuring activities:



	Three Months Ended						Nine Months Ended
	September 29, 2018			September 30, 2017			September 29, 2018			September 30, 2017
	(in thousands)
Beginning balance	$	6,810		$	7,010		$	6,856		$	8,102
Expense	4,714			636			7,929			1,976
Payments / utilization	(4,407		)	(676		)	(7,544		)	(3,506		)
Foreign currency adjustments	(55		)	200			(179		)	598
Ending balance	$	7,062		$	7,170		$	7,062		$	7,170

As of September 29, 2018 and September 30, 2017, $2.6 million and $2.9 million of severance and other personnel related costs liabilities and lease obligation liabilities, respectively, were included in accrued compensation and accrued liabilities within the Company’s unaudited condensed consolidated balance sheets and $4.4 million and $4.3 million, respectively, were included in other long-term liabilities within the Company’s unaudited condensed consolidated balance sheets.

BASIS OF PRESENTATION (Policies)	9 Months Ended
BASIS OF PRESENTATION (Policies)	Sep. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Use of Estimates	The preparation of unaudited condensed consolidated financial statements in accordance with U.S. GAAP requires that the Company make estimates and judgments that may affect the reported amounts of assets, liabilities, redeemable noncontrolling interest, revenues, expenses and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, judgments, and methodologies. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. Changes in estimates are reflected in reported results in the period in which they become known.
Consolidation	The Company’s unaudited condensed consolidated financial statements reflect its financial statements and those of its subsidiaries in which the Company holds a controlling financial interest. For consolidated entities in which the Company owns or is exposed to less than 100% of the economics, the Company records net income (loss) attributable to noncontrolling interests in its consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. Intercompany balances and transactions are eliminated in consolidation.
Fiscal Period	The Company’s fiscal year is typically based on 52-weeks, with each quarter composed of 13 weeks ending on the last Saturday on, or closest to, March 31, June 30, September 30, and December 31.
Newly Adopted and Issued Accounting Pronouncements	In March 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2018-05, “Income Taxes (Topic 740) - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (SAB 118).” This standard amends Accounting Standards Codification 740, Income Taxes (ASC 740) to provide guidance on accounting for the tax effects of U.S. Tax Reform pursuant to SAB 118, which allows companies to complete the accounting under ASC 740 within a one-year measurement period from the enactment date of U.S. Tax Reform. This standard is effective upon issuance and the Company has complied with the amendments. See Note 11, “Income Taxes” for further discussion. In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” The standard allows for reclassification from accumulated other comprehensive income to retained earnings for the stranded tax effects arising from the change in the reduction of the U.S. federal statutory income tax rate to 21% from 35%. The Company elected to early adopt this standard in fiscal year 2018 as permitted on a prospective basis, resulting in a reclassification of $3.3 million from Accumulated other comprehensive income to Retained earnings as a result of remeasuring the Company’s deferred tax liabilities related to its pension and other post-retirement benefit plan gains and losses. The Company’s policy is to release material stranded tax effects on a specific identification basis. In March 2017, the FASB issued ASU 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” The standard requires an employer to disaggregate the service cost component from the other components of net benefit cost and provides explicit guidance on the presentation of the service cost component and the other components of net benefit cost in the statements of income. The Company adopted this standard in fiscal year 2018 and applied the changes retrospectively to the presentation of the service cost component and the other components of net periodic pension cost in the statements of income for all periods presented as required. The adoption of this standard increased Operating income by $0.1 million and $0.7 million during the three and nine months ended September 30, 2017, respectively. In connection with the impact of Operating income to the Company’s reportable segments for the three months ended September 30, 2017, Research Models and Services (RMS) decreased by $0.1 million, Discovery and Safety Assessment (DSA) decreased by $0.3 million, Manufacturing Support (Manufacturing) decreased by less than $0.1 million, and Unallocated corporate increased by $0.4 million. For the nine months ended September 30, 2017, Operating income for RMS decreased by $0.1 million, DSA decreased by $1.0 million, Manufacturing decreased by less than $0.1 million, and Unallocated corporate increased by $1.7 million. In January 2017, the FASB issued ASU 2017-01, “Clarifying the Definition of a Business.” The standard clarifies the definition of a business by adding guidance to assist entities in evaluating whether transactions should be accounted for as acquisitions of assets or businesses. The Company’s adoption of this standard in fiscal year 2018 did not have a significant impact on the consolidated financial statements and related disclosures. In October 2016, the FASB issued ASU 2016-16, “Intra-Entity Transfers of Assets Other Than Inventory.” The standard requires the immediate recognition of tax effects for an intra-entity asset transfer other than inventory. The Company’s adoption of this standard in fiscal year 2018 did not have a significant impact on the consolidated financial statements and related disclosures. In January 2016, the FASB issued ASU 2016-01, “Recognition and Measurement of Financial Assets and Liabilities.” This standard, including a subsequently issued amendment under ASU 2018-03, “Technical Corrections and Improvements to Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities”, requires equity investments that are not accounted for under the equity method of accounting to be measured at fair value with changes recognized in net income, simplifies the impairment assessment of certain equity investments, and updates certain presentation and disclosure requirements. The Company adopted this standard in fiscal year 2018, resulting in an increase of $1.9 million to Other assets with a corresponding increase to Retained earnings and Deferred taxes of $1.4 million and $0.5 million, respectively. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers.” The standard, including subsequently issued amendments, replaced most existing revenue recognition guidance in U.S. GAAP and permits the use of either a modified retrospective or cumulative effect transition method. The Company elected the modified retrospective transition method. The standard requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The Company adopted this standard in fiscal year 2018. See Note 3, “Revenue From Contracts With Customers” for a discussion of the Company’s adoption of this standard and its impact on the consolidated financial statements and related disclosures. Newly Issued Accounting Pronouncements In August 2018, the FASB issued ASU 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computer Arrangement that is a Service Contract.” ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The ASU is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years and will be applied either retrospectively or prospectively. Early adoption is permitted. The Company is still evaluating the impact this standard will have on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU 2018-14, “Compensation Retirement Benefits - Defined Benefit Plans -General (Subtopic 715-20).” ASU 2018-14 removes the requirements to disclose the amounts in Accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost over the next fiscal year and the related party disclosures about the amount of future annual benefits covered by insurance contracts. In addition, the ASU adds the requirement to disclose an explanation for any significant gains and losses related to changes in the benefit obligation for the period. The ASU is effective for fiscal years ending after December 15, 2020 and will be applied on a retrospective basis to all periods presented. Early adoption is permitted. The Company is still evaluating the impact this standard will have on its consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” ASU 2018-13 removes the disclosure requirement for the amount and reasons for transfers between Level 1 and Level 2 fair value measurements as well as the process for Level 3 fair value measurements. In addition, the ASU adds the disclosure requirements for changes in unrealized gains and losses included in Other comprehensive income (loss) for recurring Level 3 fair value measurements held at the end of the reporting period as well as the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. The ASU is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years and will be applied on a retrospective basis to all periods presented. Early adoption is permitted. The Company is still evaluating the impact this standard will have on its consolidated financial statements and related disclosures. In June 2018, the FASB issued ASU 2018-07, “Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting.” ASU 2018-07 aligns the accounting for share-based payment awards issued to employees and nonemployees as well as improves financial reporting for share-based payments to nonemployees. The ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years and will be applied to all new option awards granted after the date of adoption. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company’s consolidated financial statements and related disclosures. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815) Targeted Improvements to Accounting for Hedging Activities.” ASU 2017-12 refines and expands hedge accounting for both financial and commodity risks. It also creates more transparency around how economic results are presented, both on the face of the financial statements and in the disclosures. In addition, this ASU makes certain targeted improvements to simplify the application of hedge accounting guidance. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years, and requires the modified retrospective approach. Early adoption is permitted. This update applies to all existing hedging relationships on the date of adoption with the cumulative effect of adoption being reflected as of the beginning of the fiscal year of adoption. The Company is still evaluating the impact this standard will have on its consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment.” The standard simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. This standard is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and will be applied on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The adoption of this standard is not expected to have a material impact on the Company’s consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-02, “Leases.” The standard, including subsequently issued amendments, established the principles that lessees and lessors will apply to report useful information to users of financial statements about the amount, timing and uncertainty of cash flows arising from a lease. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company formed an implementation team during fiscal year 2017 to oversee adoption of the new standard. The implementation team has completed its initial assessment of the new standard, including a detailed review of the Company’s lease portfolio. The Company continues to assess the impact on the existing lease accounting policies, newly required financial statement disclosures, and executing on the project plan. Currently, the Company is performing contract reviews, evaluating anticipated changes to systems, business processes, and internal controls to support the adoption of the new standard. The Company is still evaluating the full impact this standard will have on its consolidated financial statements and related disclosures, but expects to recognize substantially all of its leases on the balance sheet as of December 30, 2018 (day one of fiscal year 2019, which is the Company’s adoption date) by recording a right-of-use asset and a corresponding lease liability. The Company will adopt this standard using a modified retrospective transition approach to be applied to leases existing as of or entered into after the adoption date.

BUSINESS ACQUISITIONS AND DIVESTITURE (Tables)

9 Months Ended

Sep. 29, 2018

Business Combinations [Abstract]

Summary of Purchase Price Allocation

The purchase price allocation of $20.1 million, net of $0.6 million of cash acquired, was as follows:



	August 4, 2017
	(in thousands)
Trade receivables (contractual amount of $1,146)	$	1,146
Other current assets (excluding cash)	640
Property, plant and equipment	664
Other long-term assets	29
Definite-lived intangible assets	9,300
Goodwill	12,582
Current liabilities	(1,683		)
Deferred revenue	(405		)
Long-term liabilities	(2,151		)
Total purchase price allocation	$	20,122

The preliminary purchase allocation of $800.8 million, net of $27.7 million of cash acquired and a final net working capital adjustment of $1.2 million, was as follows:



	April 3, 2018
	(in thousands)
Trade receivables (contractual amount of $35,073)	$	35,073
Inventories	4,463
Other current assets (excluding cash)	5,893
Property, plant and equipment	128,403
Goodwill	440,662
Definite-lived intangible assets	309,200
Other long-term assets	1,081
Deferred revenue	(22,600		)
Current liabilities	(32,885		)
Deferred tax liabilities	(66,277		)
Other long-term liabilities	(2,213		)
Total purchase price allocation	$	800,800

The preliminary purchase price allocation of $21.5 million, net of $1.0 million of cash acquired and a final net working capital adjustment of $0.4 million, was as follows:



	January 11, 2018
	(in thousands)
Trade receivables (contractual amount of $1,309)	$	1,309
Other current assets (excluding cash)	99
Property, plant and equipment	1,136
Definite-lived intangible assets - client relationships	3,647
Goodwill	17,660
Current liabilities	(1,575		)
Deferred revenue	(151		)
Long-term liabilities	(596		)
Total purchase price allocation	$	21,529

Definite-Lived Intangible Assets Acquired as Part of Business Combination

The breakout of definite-lived intangible assets acquired was as follows:



	Definite-Lived Intangible Assets		Weighted Average Amortization Life
	(in thousands)		(in years)
Client relationships	$	264,900	13
Developed technology	23,400		3
Backlog	20,900		2
Total definite-lived intangible assets	$	309,200	12

The breakout of definite-lived intangible assets acquired was as follows:



	Definite-Lived Intangible Assets		Weighted Average Amortization Life
	(in thousands)		(in years)
Client relationships	$	7,000	13
Other intangible assets	2,300		10
Total definite-lived intangible assets	$	9,300	12

Carrying Amounts of Assets and Liabilities to be Disposed Of

The carrying amounts of the major classes of assets and liabilities associated with the divestiture of the CDMO business were as follows:



	February 10, 2017
Assets	(in thousands)
Current assets	$	5,505
Property, plant and equipment, net	11,174
Goodwill	35,857
Long-term assets	17,154
Total assets	$	69,690
Liabilities
Deferred revenue	$	4,878
Other current liabilities	1,158
Total liabilities	$	6,036

Schedule of Business Acquisition, Pro Forma Information

For the nine months ended September 30, 2017, these adjustments included additional amortization of intangible assets and depreciation of fixed assets of $17.3 million, additional interest expense on borrowings of $19.3 million, elimination of intercompany activity and other one-time costs, and the tax impacts of these adjustments.



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
Revenue	$	585,295	$	523,948	$	1,726,683	$	1,555,146
Net income attributable to common shareholders	59,297		48,927		168,872		139,258
Earnings per common share
Basic	$	1.23	$	1.03	$	3.51	$	2.93
Diluted	$	1.20	$	1.01	$	3.44	$	2.87

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

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+ Details

REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

9 Months Ended

Sep. 29, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables disaggregate the Company’s revenue by major business line and timing of transfer of products or services for the three and nine months ended September 29, 2018 (in thousands):



Major Products/Service Lines:	Three Months Ended September 29, 2018		Nine Months Ended September 29, 2018
RMS	$	126,811	$	391,195
DSA	352,257		958,665
Manufacturing	106,227		314,706
Total revenue	$	585,295	$	1,664,566



Timing of Revenue Recognition:	Three Months Ended September 29, 2018		Nine Months Ended September 29, 2018
RMS
Services and products transferred over time	$	49,417	$	146,947
Services and products transferred at a point in time	77,394		244,248
DSA
Services and products transferred over time	352,203		958,174
Services and products transferred at a point in time	54		491
Manufacturing
Services and products transferred over time	31,420		92,978
Services and products transferred at a point in time	74,807		221,728
Total revenue	$	585,295	$	1,664,566

Revenue for each significant product or service offering is as follows:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
RMS	$	126,811	$	122,020	$	391,195	$	373,183
DSA	352,257		246,946		958,665		726,796
Manufacturing	106,227		95,266		314,706		279,145
Total revenue	$	585,295	$	464,232	$	1,664,566	$	1,379,124

Revenue by geographic area is as follows:



	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)
Three Months Ended:
September 29, 2018	$	336,811	$	159,473	$	53,665	$	34,062	$	1,284	$	585,295
September 30, 2017	238,226		141,967		51,864		31,953		222		464,232
Nine Months Ended:
September 29, 2018	$	919,807	$	481,955	$	153,802	$	104,817	$	4,185	$	1,664,566
September 30, 2017	714,460		418,468		152,293		93,094		809		1,379,124

Schedule of Estimated Revenue Related to Performance Obligations

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially satisfied) as of September 29, 2018:



	Revenue Expected to be Recognized in Future Periods
	Less than 1 Year		1 to 3 Years		4 to 5 Years		Beyond 5 Years		Total
	(in thousands)
DSA	$	126,336	$	82,192	$	3,299	$	492	$	212,319
Manufacturing	10,286		20,245		9,013		68		39,612
Total	$	136,622	$	102,437	$	12,312	$	560	$	251,931

Schedule of Client Receivables, Contract Assets and Contract Liabilities

The following table provides information about client receivables, contract assets, and contract liabilities from contracts with customers:



	September 29, 2018		December 30, 2017 ⁽¹⁾
	(in thousands)
Balances from contracts with customers only:
Client receivables	$	376,302	$	335,839
Contract assets (unbilled revenue)	113,311		96,297
Contract liabilities (current and long-term deferred revenue)	178,331		125,882
Contract liabilities (customer contract deposits)	44,586		—
⁽¹⁾ The beginning balance as of December 30, 2017 is presented under the guidance of ASC 605.

SEGMENT INFORMATION (Tables)

9 Months Ended

Sep. 29, 2018

Segment Reporting [Abstract]

Schedule of Revenue and Other Financial Information by Business Segment

The following table presents revenue and other financial information by reportable segment:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
RMS
Revenue	$	126,811	$	122,020	$	391,195	$	373,183
Operating income	32,121		30,665		104,893		101,949
Depreciation and amortization	4,811		5,272		14,565		15,309
Capital expenditures	8,166		6,762		18,105		13,769
DSA
Revenue	$	352,257	$	246,946	$	958,665	$	726,796
Operating income	62,909		46,324		160,391		135,994
Depreciation and amortization	31,433		20,333		83,262		58,667
Capital expenditures	10,800		10,127		34,496		25,552
Manufacturing
Revenue	$	106,227	$	95,266	$	314,706	$	279,145
Operating income	33,266		31,920		95,904		87,563
Depreciation and amortization	5,709		5,572		17,313		17,321
Capital expenditures	2,709		2,879		12,731		7,111

Reconciliation of Segment Operating Income to Consolidated Operating Income



	Operating Income						Depreciation and Amortization				Capital Expenditures
	September 29, 2018			September 30, 2017			September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
Three Months Ended:
Total reportable segments	$	128,296		$	108,909		$	41,953	$	31,177	$	21,675	$	19,768
Unallocated corporate	(43,934		)	(34,847		)	1,639		2,288		764		2,243
Total consolidated	$	84,362		$	74,062		$	43,592	$	33,465	$	22,439	$	22,011



Nine Months Ended:
Total reportable segments	$	361,188		$	325,506		$	115,140	$	91,297	$	65,332	$	46,432
Unallocated corporate	(132,287		)	(100,052		)	5,058		6,378		6,046		7,496
Total consolidated	$	228,901		$	225,454		$	120,198	$	97,675	$	71,378	$	53,928

Revenue Disaggregated by Products and Services and Geographic Area

The following tables disaggregate the Company’s revenue by major business line and timing of transfer of products or services for the three and nine months ended September 29, 2018 (in thousands):



Major Products/Service Lines:	Three Months Ended September 29, 2018		Nine Months Ended September 29, 2018
RMS	$	126,811	$	391,195
DSA	352,257		958,665
Manufacturing	106,227		314,706
Total revenue	$	585,295	$	1,664,566



Timing of Revenue Recognition:	Three Months Ended September 29, 2018		Nine Months Ended September 29, 2018
RMS
Services and products transferred over time	$	49,417	$	146,947
Services and products transferred at a point in time	77,394		244,248
DSA
Services and products transferred over time	352,203		958,174
Services and products transferred at a point in time	54		491
Manufacturing
Services and products transferred over time	31,420		92,978
Services and products transferred at a point in time	74,807		221,728
Total revenue	$	585,295	$	1,664,566

Revenue for each significant product or service offering is as follows:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
RMS	$	126,811	$	122,020	$	391,195	$	373,183
DSA	352,257		246,946		958,665		726,796
Manufacturing	106,227		95,266		314,706		279,145
Total revenue	$	585,295	$	464,232	$	1,664,566	$	1,379,124

Revenue by geographic area is as follows:



	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)
Three Months Ended:
September 29, 2018	$	336,811	$	159,473	$	53,665	$	34,062	$	1,284	$	585,295
September 30, 2017	238,226		141,967		51,864		31,953		222		464,232
Nine Months Ended:
September 29, 2018	$	919,807	$	481,955	$	153,802	$	104,817	$	4,185	$	1,664,566
September 30, 2017	714,460		418,468		152,293		93,094		809		1,379,124

Summary of Unallocated Corporate Overhead

A summary of unallocated corporate expense consists of the following:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
Stock-based compensation	$	7,910	$	7,255	$	24,517	$	20,259
Compensation, benefits, and other employee-related expenses	20,464		11,337		56,375		36,083
External consulting and other service expenses	4,767		6,729		12,711		16,581
Information technology	3,070		3,237		8,723		9,247
Depreciation	1,639		2,288		5,058		6,378
Acquisition and integration	1,122		1,327		15,678		2,539
Other general unallocated corporate	4,962		2,674		9,225		8,965
Total unallocated corporate expense	$	43,934	$	34,847	$	132,287	$	100,052

SUPPLEMENTAL BALANCE SHEET INFORMATION (Tables)

9 Months Ended

Sep. 29, 2018

Supplemental Balance Sheet Information [Abstract]

Composition of Net Trade Receivables

The composition of trade receivables, net is as follows:



	September 29, 2018			December 30, 2017
	(in thousands)
Client receivables	$	376,302		$	335,839
Unbilled revenue	113,311			96,297
Total	489,613			432,136
Less: Allowance for doubtful accounts	(2,274		)	(2,120		)
Trade receivables, net	$	487,339		$	430,016

Composition of Inventories

The composition of inventories is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
Raw materials and supplies	$	20,798	$	19,858
Work in process	20,231		18,200
Finished products	84,471		76,898
Inventories	$	125,500	$	114,956

Composition of Other Current Assets

The composition of other current assets is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
Investments	$	5,238	$	28,489
Prepaid income taxes	36,733		52,234
Restricted cash	426		592
Other	300		—
Other current assets	$	42,697	$	81,315

Composition of Other Assets

The composition of other assets is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
Life insurance policies	$	35,916	$	34,008
Venture capital investments	95,837		71,101
Restricted cash	2,584		1,945
Other	20,258		16,948
Other assets	$	154,595	$	124,002

Composition of Other Current Liabilities

The composition of other current liabilities is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
Accrued income taxes	$	21,387	$	43,250
Customer contract deposits	44,586		—
Other	938		1,210
Other current liabilities	$	66,911	$	44,460

Composition of Other Long-Term Liabilities

The composition of other long-term liabilities is as follows:



	September 29, 2018		December 30, 2017
	(in thousands)
U.S. Transition Tax	$	52,070	$	61,038
Long-term pension liability	20,231		52,364
Accrued executive supplemental life insurance retirement plan and deferred compensation plan	38,610		37,582
Long-term deferred revenue	37,571		8,313
Other	36,472		35,518
Other long-term liabilities	$	184,954	$	194,815

FAIR VALUE (Tables)

9 Months Ended

Sep. 29, 2018

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are summarized below:



	September 29, 2018
	Level 1		Level 2		Level 3		Total
	(in thousands)
Cash equivalents	$	—	$	18,717	$	—	$	18,717
Other current assets:
Foreign currency forward contract			29				29
Other assets:
Life insurance policies	—		28,193		—		28,193
Total assets measured at fair value	$	—	$	46,939	$	—	$	46,939

Other current liabilities:
Contingent consideration	$	—	$	—	$	3,400	$	3,400
Total liabilities measured at fair value	$	—	$	—	$	3,400	$	3,400



	December 30, 2017
	Level 1		Level 2		Level 3		Total
	(in thousands)
Cash equivalents	$	—	$	21	$	—	$	21
Other assets:
Life insurance policies	—		26,358		—		26,358
Total assets measured at fair value	$	—	$	26,379	$	—	$	26,379

Other current liabilities:
Contingent consideration	$	—	$	—	$	298	$	298
Total liabilities measured at fair value	$	—	$	—	$	298	$	298

Rollforward of Contingent Consideration Related to Previous Acquisitions

The following table provides a rollforward of the contingent consideration related to previous business acquisitions. See Note 2, “Business Acquisitions and Divestiture.”



	Nine Months Ended
	September 29, 2018			September 30, 2017
	(in thousands)
Beginning balance	$	298		$	3,621
Additions	3,315			296
Payments	—			(3,606		)
Foreign currency translation	(213		)	—
Reversal of previously recorded contingent liability	—			(15		)
Ending balance	$	3,400		$	296

GOODWILL AND INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 29, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Rollforward of Goodwill

The following table provides a rollforward of the Company’s goodwill:



			Adjustments to Goodwill
	December 30, 2017		Acquisitions		Foreign Exchange			September 29, 2018
	(in thousands)
RMS	$	58,122	$	—	$	(1,059	)	$	57,063
DSA	605,176		459,228		(9,428		)	1,054,976
Manufacturing	141,608		2,551		(3,498		)	140,661
Goodwill	$	804,906	$	461,779	$	(13,985	)	$	1,252,700

Schedule of Intangible Assets

The following table displays intangible assets, net by major class:



	September 29, 2018							December 30, 2017
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(in thousands)
Backlog	$	20,900	$	(12,391	)	$	8,509	$	8,111	$	(8,111	)	$	—
Technology	102,794		(39,271		)	63,523		81,309		(27,157		)	54,152
Trademarks and trade names	8,466		(4,619		)	3,847		8,661		(4,562		)	4,099
Other	17,532		(9,477		)	8,055		17,465		(7,845		)	9,620
Other intangible assets	149,692		(65,758		)	83,934		115,546		(47,675		)	67,871
Client relationships	798,574		(252,775		)	545,799		540,425		(238,534		)	301,891
Intangible assets	$	948,266	$	(318,533	)	$	629,733	$	655,971	$	(286,209	)	$	369,762

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS (Tables)

9 Months Ended

Sep. 29, 2018

Debt Disclosure [Abstract]

Schedule of Debt

Long-term debt, net consists of the following:



	September 29, 2018			December 30, 2017
	(in thousands)
Term loans	$	740,625		$	601,250
Revolving facility	411,931			500,997
Senior Notes	500,000			—
Other long-term debt	18,091			18,292
Total debt	1,670,647			1,120,539
Less: Current portion of long-term debt	(28,229		)	(28,546		)
Long-term debt	1,642,418			1,091,993
Debt discount and debt issuance costs	(17,068		)	(5,770		)
Long-term debt, net	$	1,625,350		$	1,086,223

EQUITY AND NONCONTROLLING INTEREST (Tables)

9 Months Ended

Sep. 29, 2018

Equity [Abstract]

Reconciliation of the Numerator and Denominator in the Computations of the Basic and Diluted Earnings Per Share

The following table reconciles the numerator and denominator in the computations of basic and diluted earnings per share:



	Three Months Ended					Nine Months Ended
	September 29, 2018		September 30, 2017			September 29, 2018		September 30, 2017
	(in thousands)
Numerator:
Income from continuing operations, net of income taxes	$	60,902	$	52,994		$	167,020	$	154,630
Income (loss) from discontinued operations, net of income taxes	—		(39		)	1,506		(114		)
Less: Net income attributable to noncontrolling interests	534		481			1,818		1,312
Net income attributable to common shareholders	$	60,368	$	52,474		$	166,708	$	153,204

Denominator:
Weighted-average shares outstanding - Basic	48,310		47,451			48,098		47,530
Effect of dilutive securities:
Stock options, restricted stock units, performance share units and restricted stock	1,016		939			1,020		910
Weighted-average shares outstanding - Diluted	49,326		48,390			49,118		48,440

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes to each component of accumulated other comprehensive income (loss), net of income taxes, are as follows:



	Foreign Currency Translation Adjustment and Other			Pension and Other Post-Retirement Benefit Plans			Total
	(in thousands)
December 30, 2017	$	(77,545	)	$	(67,186	)	$	(144,731	)
Other comprehensive loss before reclassifications	(13,592		)	—			(13,592		)
Amounts reclassified from accumulated other comprehensive loss	—			1,864			1,864
Net current period other comprehensive (loss) income	(13,592		)	1,864			(11,728		)
Amount reclassified from accumulated other comprehensive loss due to adoption of ASU 2018-02 (See Note 1)	—			3,330			3,330
Income tax (benefit) expense	(801		)	460			(341		)
September 29, 2018	$	(90,336	)	$	(69,112	)	$	(159,448	)

Rollforward Redeemable Noncontrolling Interest

The following table provides a rollforward of the activity related to the Company’s redeemable noncontrolling interest:



	Nine Months Ended
	September 29, 2018			September 30, 2017
	(in thousands)
Beginning balance	$	16,609		$	14,659
Total gains or losses (realized/unrealized):
Net income attributable to noncontrolling interest	543			474
Adjustment to redemption value	1,111			—
Foreign currency translation	(932		)	652
Ending balance	$	17,331		$	15,785

PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS (Tables)

9 Months Ended

Sep. 29, 2018

Retirement Benefits [Abstract]

Schedule of Net Periodic Cost

The following table provides the components of net periodic cost for the Company’s pension, deferred compensation and executive supplemental life insurance retirement plans:



	Three Months Ended						Nine Months Ended
	September 29, 2018			September 30, 2017			September 29, 2018			September 30, 2017
	(in thousands)
Service cost	$	814		$	749		$	2,629		$	2,277
Interest cost	2,752			2,663			8,241			8,428
Expected return on plan assets	(3,801		)	(3,476		)	(11,690		)	(10,411		)
Amortization of prior service credit	(135		)	(134		)	(406		)	(392		)
Amortization of net loss	736			1,017			2,267			3,030
Net periodic cost	$	366		$	819		$	1,041		$	2,932

STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 29, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Stock-Based Compensation Expense

The following table provides stock-based compensation by the financial statement line item in which it is reflected:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
Cost of revenue	$	1,596	$	1,700	$	4,747	$	4,989
Selling, general and administrative	10,224		9,826		31,161		27,913
Stock-based compensation	$	11,820	$	11,526	$	35,908	$	32,902

FOREIGN CURRENCY CONTRACT (Tables)

9 Months Ended

Sep. 29, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional and Fair Value of Foreign Currency Contracts

The notional amount and fair value of the Company’s foreign currency forward contract is summarized as follows:



	Notional Amount		Fair Value		Balance Sheet Location
	(in thousands)
September 29, 2018	$	28,665	$	29	Other Current Asset

RESTRUCTURING AND ASSET IMPAIRMENT (Tables)

9 Months Ended

Sep. 29, 2018

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Costs



	Three Months Ended
	September 29, 2018						September 30, 2017
	Severance and Transition Costs		Asset Impairments and Other Costs		Total		Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)
Cost of services provided and products sold (excluding amortization of intangible assets)	$	30	$	5	$	35	$	189	$	276	$	465
Selling, general and administrative	4,619		21		4,640		447		—		447
Total	$	4,649	$	26	$	4,675	$	636	$	276	$	912



	Nine Months Ended
	September 29, 2018						September 30, 2017
	Severance and Transition Costs		Asset Impairments and Other Costs		Total		Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)
Cost of services provided and products sold (excluding amortization of intangible assets)	$	767	$	27	$	794	$	1,188	$	485	$	1,673
Selling, general and administrative	6,354		21		6,375		788		—		788
Total	$	7,121	$	48	$	7,169	$	1,976	$	485	$	2,461

The following table presents restructuring costs by reportable segment for these productivity improvement initiatives:



	Three Months Ended				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
	(in thousands)
DSA	$	56	$	360	$	1,021	$	841
Manufacturing	—		552		870		1,620
Unallocated corporate	4,619		—		5,278		—
Total	$	4,675	$	912	$	7,169	$	2,461



	Three Months Ended								Nine Months Ended
	September 29, 2018
	Severance and Transition Costs			Asset Impairments and Other Costs		Total			Severance and Transition Costs		Asset Impairments and Other Costs		Total
	(in thousands)
Cost of services provided and products sold (excluding amortization of intangible assets)	$	95		$	238	$	333		$	650	$	822	$	1,472
Selling, general and administrative	(30		)	—		(30		)	158		—		158
Total	$	65		$	238	$	303		$	808	$	822	$	1,630

Rollforward of Company's Severance and Transition Costs and Lease Obligation Liabilities

The following table provides a rollforward for all of the Company’s severance and transition costs, and lease obligation liabilities related to all restructuring activities:



	Three Months Ended						Nine Months Ended
	September 29, 2018			September 30, 2017			September 29, 2018			September 30, 2017
	(in thousands)
Beginning balance	$	6,810		$	7,010		$	6,856		$	8,102
Expense	4,714			636			7,929			1,976
Payments / utilization	(4,407		)	(676		)	(7,544		)	(3,506		)
Foreign currency adjustments	(55		)	200			(179		)	598
Ending balance	$	7,062		$	7,170		$	7,062		$	7,170

BASIS OF PRESENTATION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
BASIS OF PRESENTATION (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amount reclassified from accumulated other comprehensive loss to retained earnings			$ 3,330
Adjustments to operating income related to adoption of new accounting guidance	$ 84,362	$ 74,062	228,901	$ 225,454
Adjustments to other assets as a result of adoption of new accounting guidance	154,595		154,595		$ 124,002
Adjustment to retained earnings as a result of newly adopted accounting guidance	460,120		460,120		288,658
Adjustment to deferred tax assets as a result of newly adopted accounting guidance	24,562		24,562		$ 22,654
Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance		100		700
Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to other assets as a result of adoption of new accounting guidance	1,900		1,900
Adjustment to retained earnings as a result of newly adopted accounting guidance	1,400		1,400
Adjustment to deferred tax assets as a result of newly adopted accounting guidance	500		500
RMS
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance	32,121	30,665	104,893	101,949
RMS \| Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance		(100)		(100)
DSA
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance	62,909	46,324	160,391	135,994
DSA \| Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance		(300)		(1,000)
Manufacturing
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance	33,266	31,920	95,904	87,563
Manufacturing \| Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance		(100)		(100)
Unallocated corporate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance	$ (43,934)	(34,847)	$ (132,287)	(100,052)
Unallocated corporate \| Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance		$ 400		$ 1,700

BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Narrative (Details) - USD ($)		3 Months Ended	9 Months Ended
	Apr. 03, 2018	Sep. 29, 2018	Sep. 29, 2018	Sep. 30, 2017	Mar. 26, 2018
Credit facility \| $2.3 Billion Credit Facility
Business Acquisition [Line Items]
Credit facility					$ 2,300,000,000.0
MPI Research
Business Acquisition [Line Items]
Purchase price	$ 829,700,000
Purchase price allocation	800,800,000
Cash acquired	27,700,000
Adjustments related to prior period	1,200,000
Goodwill, amount expected to be deductible for tax purposes	$ 4,100,000
Integration related costs and transaction costs		$ 800,000	$ 15,300,000
Pro forma revenue since acquisition date		70,200,000	136,800,000
Pro forma operating income since acquisition date		$ 12,200,000	20,400,000
Depreciation and Amortization Expense \| MPI Research
Business Acquisition [Line Items]
Adjustments related to prior period			11,800,000	$ 17,300,000
Interest Expense \| MPI Research
Business Acquisition [Line Items]
Adjustments related to prior period			$ 2,800,000	$ 19,300,000

BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Purchase Price Allocation (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Apr. 03, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Trade receivables, contractual amount		$ 35,073
Goodwill	$ 1,252,700		$ 804,906
MPI Research
Business Acquisition [Line Items]
Trade receivables		35,073
Inventories		4,463
Other current assets (excluding cash)		5,893
Property, plant and equipment		128,403
Goodwill		440,662
Definite-lived intangible assets		309,200
Other long-term assets		1,081
Deferred revenue		(22,600)
Current liabilities		(32,885)
Deferred tax liabilities		(66,277)
Other long-term liabilities		(2,213)
Total purchase price allocation		$ 800,800

BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Definite-Lived Intangible Assets (Details) - MPI Research $ in Thousands	Apr. 03, 2018 USD ($)
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 309,200
Weighted Average Amortization Life	12 years
Client relationships
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 264,900
Weighted Average Amortization Life	13 years
Developed technology
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 23,400
Weighted Average Amortization Life	3 years
Backlog
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 20,900
Weighted Average Amortization Life	2 years

BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Pro Forma Information (Details) - MPI Research - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Revenue	$ 585,295	$ 523,948	$ 1,726,683	$ 1,555,146
Net income attributable to common shareholders	$ 59,297	$ 48,927	$ 168,872	$ 139,258
Earnings per common share
Basic (in dollars per share)	$ 1.23	$ 1.03	$ 3.51	$ 2.93
Diluted (in dollars per share)	$ 1.20	$ 1.01	$ 3.44	$ 2.87

BUSINESS ACQUISITIONS AND DIVESTITURE - KWS BioTest Limited Narrative (Details) - KWS BioTest Limited $ in Thousands, £ in Millions		3 Months Ended	9 Months Ended
	Jan. 11, 2018 USD ($)	Sep. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)	Sep. 29, 2018 GBP (£)	Jan. 11, 2018 GBP (£)
Business Acquisition [Line Items]
Purchase price	$ 20,300
Undiscounted contingent payments	3,900	$ 2,600	$ 2,600	£ 2.0	£ 3.0
Purchase price allocation	21,529
Cash acquired	1,000
Adjustments related to prior period	$ 400
Integration related costs and transaction costs		$ 100	$ 600
Client relationships
Business Acquisition [Line Items]
Weighted average amortization life of intangible assets acquired			12 years

BUSINESS ACQUISITIONS AND DIVESTITURE - KWS BioTest Limited Purchase Price Allocation (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Apr. 03, 2018	Jan. 11, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Trade receivables, contractual amount		$ 35,073
Goodwill	$ 1,252,700			$ 804,906
KWS BioTest Limited
Business Acquisition [Line Items]
Trade receivables, contractual amount			$ 1,309
Trade receivables			1,309
Other current assets (excluding cash)			99
Property, plant and equipment			1,136
Definite-lived intangible assets - client relationships			3,647
Goodwill			17,660
Current liabilities			(1,575)
Deferred revenue			(151)
Other long-term liabilities			(596)
Total purchase price allocation			$ 21,529

BUSINESS ACQUISITIONS AND DIVESTITURE - Brains On-Line Narrative (Details) - Brains On-Line $ in Thousands, € in Millions		3 Months Ended		9 Months Ended
	Aug. 04, 2017 USD ($)	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Aug. 04, 2017 EUR (€)	Aug. 04, 2017 USD ($)
Business Acquisition [Line Items]
Purchase price	$ 21,300
Undiscounted contingent payments						€ 6.7	$ 7,800
Purchase price allocation							$ 20,122
Cash acquired	$ 600
Integration related costs and transaction costs		$ 0	$ 1,200	$ 0	$ 2,100

BUSINESS ACQUISITIONS AND DIVESTITURE - Brains On-Line Purchase Price Allocation (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Apr. 03, 2018	Dec. 30, 2017	Aug. 04, 2017
Business Acquisition [Line Items]
Trade receivables, contractual amount		$ 35,073
Goodwill	$ 1,252,700		$ 804,906
Brains On-Line
Business Acquisition [Line Items]
Trade receivables, contractual amount				$ 1,146
Trade receivables				1,146
Other current assets (excluding cash)				640
Property, plant and equipment				664
Other long-term assets				29
Definite-lived intangible assets				9,300
Goodwill				12,582
Current liabilities				(1,683)
Deferred revenue				(405)
Other long-term liabilities				(2,151)
Total purchase price allocation				$ 20,122

BUSINESS ACQUISITIONS AND DIVESTITURE - Brains On-Line Definite-Lived Intangible Assets (Details) - Brains On-Line $ in Thousands	Aug. 04, 2017 USD ($)
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 9,300
Weighted Average Amortization Life	12 years
Client relationships
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 7,000
Weighted Average Amortization Life	13 years
Other intangible assets
Business Acquisition [Line Items]
Definite-Lived Intangible Assets	$ 2,300
Weighted Average Amortization Life	10 years

BUSINESS ACQUISITIONS AND DIVESTITURE - Contract Manufacturing Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Feb. 10, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestiture		$ 0	$ 10,577
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| CDMO Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from divestiture				$ 75,000
Cash and cash equivalents transferred				600
Working capital adjustments				$ 300
Gain on divestiture	$ 10,600

BUSINESS ACQUISITIONS AND DIVESTITURE - Contract Manufacturing, Schedule of Assets and Liabilities Disposed (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017	Feb. 10, 2017
Liabilities
Deferred revenue		$ 1,815
Other current liabilities	$ 0	$ 3,942
CDMO Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Assets
Current assets			$ 5,505
Property, plant and equipment, net			11,174
Goodwill			35,857
Long-term assets			17,154
Total assets			69,690
Liabilities
Deferred revenue			4,878
Other current liabilities			1,158
Total liabilities			$ 6,036

REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenues by Major Business Line (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenue	$ 585,295	$ 464,232	$ 1,664,566	$ 1,379,124
RMS
Disaggregation of Revenue [Line Items]
Total revenue	126,811	122,020	391,195	373,183
DSA
Disaggregation of Revenue [Line Items]
Total revenue	352,257	246,946	958,665	726,796
Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	106,227	$ 95,266	314,706	$ 279,145
Services and products transferred over time \| RMS
Disaggregation of Revenue [Line Items]
Total revenue	49,417		146,947
Services and products transferred over time \| DSA
Disaggregation of Revenue [Line Items]
Total revenue	352,203		958,174
Services and products transferred over time \| Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	31,420		92,978
Services and products transferred at a point in time \| RMS
Disaggregation of Revenue [Line Items]
Total revenue	77,394		244,248
Services and products transferred at a point in time \| DSA
Disaggregation of Revenue [Line Items]
Total revenue	54		491
Services and products transferred at a point in time \| Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	$ 74,807		$ 221,728

REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Dec. 30, 2017
Revenue from Contract with Customer [Abstract]
Payment terms	30 days
Unpaid advanced client billings	$ 16,000
Contract liabilities (customer contract deposits)	44,586	$ 0
Revenue billed during period	88,000
Revenue recognized during period related to contract liabilities	$ 110,000

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Client Receivables, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Client receivables	$ 376,302	$ 335,839
Contract assets (unbilled revenue)	113,311	96,297
Contract liabilities (current and long-term deferred revenue)	178,331
Contract liabilities (customer contract deposits)	$ 44,586	0
Calculated under Revenue Guidance in Effect before Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Client receivables		335,839
Contract assets (unbilled revenue)		96,297
Contract liabilities (current and long-term deferred revenue)		125,882
Contract liabilities (customer contract deposits)		$ 0

SEGMENT INFORMATION - Narrative (Details)	9 Months Ended
SEGMENT INFORMATION - Narrative (Details)	Sep. 29, 2018 segments
Segment Reporting [Abstract]
Number of reportable segments	3

SEGMENT INFORMATION - Revenue and Other Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 585,295	$ 464,232	$ 1,664,566	$ 1,379,124
Operating income	84,362	74,062	228,901	225,454
Depreciation and amortization	43,592	33,465	120,198	97,675
Capital expenditures	22,439	22,011	71,378	53,928
RMS
Segment Reporting Information [Line Items]
Total revenue	126,811	122,020	391,195	373,183
Operating income	32,121	30,665	104,893	101,949
Depreciation and amortization	4,811	5,272	14,565	15,309
Capital expenditures	8,166	6,762	18,105	13,769
DSA
Segment Reporting Information [Line Items]
Total revenue	352,257	246,946	958,665	726,796
Operating income	62,909	46,324	160,391	135,994
Depreciation and amortization	31,433	20,333	83,262	58,667
Capital expenditures	10,800	10,127	34,496	25,552
Manufacturing
Segment Reporting Information [Line Items]
Total revenue	106,227	95,266	314,706	279,145
Operating income	33,266	31,920	95,904	87,563
Depreciation and amortization	5,709	5,572	17,313	17,321
Capital expenditures	$ 2,709	$ 2,879	$ 12,731	$ 7,111

SEGMENT INFORMATION - Reconciliation of Segment Operating Income, Depreciation and Amortization, and Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Operating income	$ 84,362	$ 74,062	$ 228,901	$ 225,454
Depreciation and amortization	43,592	33,465	120,198	97,675
Capital expenditures	22,439	22,011	71,378	53,928
Total reportable segments
Segment Reporting Information [Line Items]
Operating income	128,296	108,909	361,188	325,506
Depreciation and amortization	41,953	31,177	115,140	91,297
Capital expenditures	21,675	19,768	65,332	46,432
Unallocated corporate
Segment Reporting Information [Line Items]
Operating income	(43,934)	(34,847)	(132,287)	(100,052)
Depreciation and amortization	1,639	2,288	5,058	6,378
Capital expenditures	$ 764	$ 2,243	$ 6,046	$ 7,496

SEGMENT INFORMATION - Revenue Per Significant Product or Service (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 585,295	$ 464,232	$ 1,664,566	$ 1,379,124
RMS
Segment Reporting Information [Line Items]
Total revenue	126,811	122,020	391,195	373,183
DSA
Segment Reporting Information [Line Items]
Total revenue	352,257	246,946	958,665	726,796
Manufacturing
Segment Reporting Information [Line Items]
Total revenue	$ 106,227	$ 95,266	$ 314,706	$ 279,145

SEGMENT INFORMATION - Summary of Unallocated Corporate Overhead (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Stock-based compensation	$ 11,820	$ 11,526	$ 35,908	$ 32,902
Unallocated corporate
Segment Reporting Information [Line Items]
Stock-based compensation	7,910	7,255	24,517	20,259
Compensation, benefits, and other employee-related expenses	20,464	11,337	56,375	36,083
External consulting and other service expenses	4,767	6,729	12,711	16,581
Information technology	3,070	3,237	8,723	9,247
Depreciation	1,639	2,288	5,058	6,378
Acquisition and integration	1,122	1,327	15,678	2,539
Other general unallocated corporate	4,962	2,674	9,225	8,965
Total unallocated corporate expense	$ 43,934	$ 34,847	$ 132,287	$ 100,052

SEGMENT INFORMATION - Disaggregation of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 585,295	$ 464,232	$ 1,664,566	$ 1,379,124
U.S.
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	336,811	238,226	919,807	714,460
Europe
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	159,473	141,967	481,955	418,468
Canada
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	53,665	51,864	153,802	152,293
Asia Pacific
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	34,062	31,953	104,817	93,094
Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 1,284	$ 222	$ 4,185	$ 809

SUPPLEMENTAL BALANCE SHEET INFORMATION (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017	Sep. 30, 2017
Composition of trade receivables
Client receivables	$ 376,302	$ 335,839
Contract assets (unbilled revenue)	113,311	96,297
Total	489,613	432,136
Less: Allowance for doubtful accounts	(2,274)	(2,120)
Trade receivables, net	487,339	430,016
Composition of inventories
Raw materials and supplies	20,798	19,858
Work in process	20,231	18,200
Finished products	84,471	76,898
Inventories	125,500	114,956
Composition of other current assets
Investments	5,238	28,489
Prepaid income taxes	36,733	52,234
Restricted cash	426	592	$ 591
Other	300	0
Other current assets	42,697	81,315
Composition of other assets
Life insurance policies	35,916	34,008
Venture capital investments	95,837	71,101
Restricted cash	2,584	1,945	$ 1,944
Other	20,258	16,948
Other assets	154,595	124,002
Composition of other current liabilities
Accrued income taxes	21,387	43,250
Customer contract deposits	44,586	0
Other	938	1,210
Other current liabilities	66,911	44,460
Composition of other long-term liabilities
U.S. Transition Tax	52,070	61,038
Long-term pension liability	20,231	52,364
Accrued executive supplemental life insurance retirement plan and deferred compensation plan	38,610	37,582
Long-term deferred revenue	37,571	8,313
Other	36,472	35,518
Other long-term liabilities	$ 184,954	$ 194,815

VENTURE CAPITAL INVESTMENTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Committed contribution	$ 114.9		$ 114.9
Venture capital investments	65.3		65.3
Dividends received	5.6	$ 3.3	14.1	$ 7.7
Gain (loss) from venture capital investments	$ 5.4	$ 5.6	$ 22.8	$ 12.3
Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	1.00%		1.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	12.00%		12.00%

FAIR VALUE - Narrative (Details)	Apr. 03, 2018
Senior Notes \| Senior Notes Due 2026
Debt Instrument [Line Items]
Stated interest rate	5.50%

FAIR VALUE - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 18,717	$ 21
Other current assets:
Foreign currency forward contract	29
Other assets:
Life insurance policies	28,193	26,358
Total assets measured at fair value	46,939	26,379
Other current liabilities:
Contingent consideration	3,400	298
Total liabilities measured at fair value	3,400	298
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Other assets:
Life insurance policies	0	0
Total assets measured at fair value	0	0
Other current liabilities:
Contingent consideration	0	0
Total liabilities measured at fair value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	18,717	21
Other current assets:
Foreign currency forward contract	29
Other assets:
Life insurance policies	28,193	26,358
Total assets measured at fair value	46,939	26,379
Other current liabilities:
Contingent consideration	0	0
Total liabilities measured at fair value	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Other assets:
Life insurance policies	0	0
Total assets measured at fair value	0	0
Other current liabilities:
Contingent consideration	3,400	298
Total liabilities measured at fair value	$ 3,400	$ 298

FAIR VALUE - Contingent Consideration (Details) - Contingent Consideration - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 298	$ 3,621
Additions	3,315	296
Payments	0	(3,606)
Foreign currency translation	(213)	0
Reversal of previously recorded contingent liability	0	(15)
Ending balance	$ 3,400	$ 296

GOODWILL AND INTANGIBLE ASSETS - Rollforward of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 29, 2018 USD ($)
Changes in gross carrying amount and accumulated amortization of goodwill
December 30, 2017	$ 804,906
Acquisitions	461,779
Foreign Exchange	(13,985)
September 29, 2018	1,252,700
RMS
Changes in gross carrying amount and accumulated amortization of goodwill
December 30, 2017	58,122
Acquisitions	0
Foreign Exchange	(1,059)
September 29, 2018	57,063
DSA
Changes in gross carrying amount and accumulated amortization of goodwill
December 30, 2017	605,176
Acquisitions	459,228
Foreign Exchange	(9,428)
September 29, 2018	1,054,976
Manufacturing
Changes in gross carrying amount and accumulated amortization of goodwill
December 30, 2017	141,608
Acquisitions	2,551
Foreign Exchange	(3,498)
September 29, 2018	$ 140,661

GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Other intangible assets
Gross	$ 948,266	$ 655,971
Accumulated Amortization	(318,533)	(286,209)
Net	629,733	369,762
Backlog
Other intangible assets
Gross	20,900	8,111
Accumulated Amortization	(12,391)	(8,111)
Net	8,509	0
Technology
Other intangible assets
Gross	102,794	81,309
Accumulated Amortization	(39,271)	(27,157)
Net	63,523	54,152
Trademarks and trade names
Other intangible assets
Gross	8,466	8,661
Accumulated Amortization	(4,619)	(4,562)
Net	3,847	4,099
Other
Other intangible assets
Gross	17,532	17,465
Accumulated Amortization	(9,477)	(7,845)
Net	8,055	9,620
Other intangible assets
Other intangible assets
Gross	149,692	115,546
Accumulated Amortization	(65,758)	(47,675)
Net	83,934	67,871
Client relationships
Other intangible assets
Gross	798,574	540,425
Accumulated Amortization	(252,775)	(238,534)
Net	$ 545,799	$ 301,891

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Dec. 30, 2017
Debt Instrument [Line Items]
Total debt	$ 1,670,647	$ 1,120,539
Less: Current portion of long-term debt	(28,229)	(28,546)
Long-term debt	1,642,418	1,091,993
Debt discount and debt issuance costs	(17,068)	(5,770)
Long-term debt, net	1,625,350	1,086,223
Term loans
Debt Instrument [Line Items]
Total debt	740,625	601,250
Revolving facility
Debt Instrument [Line Items]
Total debt	411,931	500,997
Senior Notes
Debt Instrument [Line Items]
Total debt	500,000	0
Other long-term debt
Debt Instrument [Line Items]
Total debt	$ 18,091	$ 18,292

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS - Narrative (Details)			9 Months Ended
	Apr. 03, 2018 USD ($)	Mar. 26, 2018 USD ($) payment	Sep. 29, 2018 USD ($)	Feb. 12, 2018 USD ($)	Dec. 30, 2017 USD ($)
Debt Instrument [Line Items]
Weighted average interest rate			3.72%		2.45%
Number of consecutive fiscal quarters			1 year
Other Capital Lease Obligations
Debt Instrument [Line Items]
Other capital lease obligations			$ 30,800,000		$ 30,300,000
$2.3 Billion Credit Facility \| Credit facility
Debt Instrument [Line Items]
Credit facility		$ 2,300,000,000.0
Gross debt issuance costs			6,200,000
Debt issuance costs			1,000,000
Maximum borrowing capacity, term loan and line of credit facility, potential increase available		$ 1,000,000,000.0
Minimum EBITDA less capital expenditures to consolidated cash interest expense ratio		3.50
Maximum consolidated indebtedness to consolidated EBITDA		4.50
Maximum consolidated indebtedness to consolidated EBITDA, with step-downs		3.50
$2.3 Billion Credit Facility \| Credit facility \| Federal Funds Rate
Debt Instrument [Line Items]
Interest rate		0.50%
$2.3 Billion Credit Facility \| Credit facility \| LIBOR
Debt Instrument [Line Items]
Interest rate		1.00%
$2.3 Billion Credit Facility \| Credit facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility		$ 1,550,000,000.00
Term Loan \| Credit facility
Debt Instrument [Line Items]
Credit facility		$ 750,000,000.0
Number of quarterly installment payments \| payment		19
Senior Notes Due 2026 \| Senior Notes
Debt Instrument [Line Items]
Gross debt issuance costs	$ 7,400,000
Aggregate principal amount	$ 500,000,000
Stated interest rate	5.50%
Redemption price percentage, conditional upon equity offerings	40.00%
Redemption price percentage in the event of a change of control	101.00%
Net proceeds from debt	$ 493,800,000
Senior Notes Due 2026 \| Senior Notes \| Redemption Period One
Debt Instrument [Line Items]
Redemption price percentage	100.00%
Senior Notes Due 2026 \| Senior Notes \| Redemption Period Two
Debt Instrument [Line Items]
Redemption price percentage	105.50%
Bridge Loan
Debt Instrument [Line Items]
Credit facility				$ 830,000,000
Gross debt issuance costs			1,800,000
Fees paid for temporary backstop facility			2,000,000
Letter of Credit
Debt Instrument [Line Items]
Letters of credit outstanding			$ 5,500,000		$ 4,900,000

EQUITY AND NONCONTROLLING INTEREST - Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Numerator:
Income from continuing operations, net of income taxes	$ 60,902	$ 52,994	$ 167,020	$ 154,630
Income (loss) from discontinued operations, net of income taxes	0	(39)	1,506	(114)
Less: Net income attributable to noncontrolling interests	534	481	1,818	1,312
Net income attributable to common shareholders	$ 60,368	$ 52,474	$ 166,708	$ 153,204
Denominator:
Weighted-average shares outstanding—Basic (in shares)	48,310	47,451	48,098	47,530
Effect of dilutive securities:
Stock options, restricted stock units, performance share units and restricted stock (in shares)	1,016	939	1,020	910
Weighted-average shares outstanding—Diluted (in shares)	49,326	48,390	49,118	48,440

EQUITY AND NONCONTROLLING INTEREST - Earnings Per Share, Additional Information (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount (in shares)	0.5	0.4	0.5	0.6
Restricted Stock and Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount (in shares)			1.0	1.1

EQUITY AND NONCONTROLLING INTEREST - Treasury Shares (Details) - USD ($)	1 Months Ended	9 Months Ended
	Oct. 31, 2018	Sep. 29, 2018	Sep. 30, 2017
Treasury Shares
Purchase of treasury stock		$ 13,791,000	$ 106,902,000
Shares acquired to satisfy minimum individual statutory tax withholdings for vesting of equity instruments (in shares)		100,000	200,000
Shares acquired to satisfy minimum individual statutory tax withholdings for vesting of equity instruments		$ 13,800,000	$ 16,300,000
Subsequent Event
Treasury Shares
Treasury shares retired (in shares)	40,200,000
Authorized Share Repurchase Program
Treasury Shares
Purchase of treasury stock		$ 0	$ 90,600,000
Stock repurchased during period (in shares)		0	1,000,000
Stock repurchase authorization		$ 1,300,000,000.0
Remaining authorized repurchase amount		$ 129,100,000

EQUITY AND NONCONTROLLING INTEREST - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Other comprehensive loss before reclassifications			$ (13,592)
Amounts reclassified from accumulated other comprehensive loss			1,864
Net current period other comprehensive (loss) income			(11,728)
Amount reclassified from accumulated other comprehensive loss due to adoption of ASU 2018-02 (See Note 1)			3,330
Income tax (benefit) expense	$ 257	$ 153	(341)	$ 776
Foreign Currency Translation Adjustment and Other
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 30, 2017			(77,545)
Other comprehensive loss before reclassifications			(13,592)
Amounts reclassified from accumulated other comprehensive loss			0
Net current period other comprehensive (loss) income			(13,592)
Amount reclassified from accumulated other comprehensive loss due to adoption of ASU 2018-02 (See Note 1)			0
Income tax (benefit) expense			(801)
September 29, 2018	(90,336)		(90,336)
Pension and Other Post-Retirement Benefit Plans
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 30, 2017			(67,186)
Other comprehensive loss before reclassifications			0
Amounts reclassified from accumulated other comprehensive loss			1,864
Net current period other comprehensive (loss) income			1,864
Amount reclassified from accumulated other comprehensive loss due to adoption of ASU 2018-02 (See Note 1)			3,330
Income tax (benefit) expense			460
September 29, 2018	(69,112)		(69,112)
Total
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 30, 2017			(144,731)
September 29, 2018	$ (159,448)		$ (159,448)

EQUITY AND NONCONTROLLING INTEREST - Redeemable Noncontrolling Interest, Additional Information (Details) $ in Millions	Sep. 29, 2018 USD ($)
Investment [Line Items]
Contractually defined redemption value	$ 17.3
Vital River
Investment [Line Items]
Noncontrolling interest ownership percentage	13.00%

EQUITY AND NONCONTROLLING INTEREST - Rollforward of Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance	$ 16,609	$ 14,659
Total gains or losses (realized/unrealized):
Adjustment to redemption value	1,111	0
Foreign currency translation	(932)	652
Ending balance	17,331	15,785
Net income attributable to noncontrolling interest
Total gains or losses (realized/unrealized):
Net income attributable to noncontrolling interest	$ 543	$ 474

INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
INCOME TAXES (Details) - USD ($) $ in Millions	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Effective tax rate	16.90%	27.30%	19.20%	32.20%
Decrease in unrecognized tax benefits due to settlement of prior positions with tax authorities	$ 0.3
Unrecognized tax benefits	20.1		$ 20.1
Increase in unrecognized tax benefits that would impact effective tax rate	0.8
Unrecognized tax benefits that would impact effective tax rate	18.8		18.8
Accrued interest and penalties on unrecognized tax benefits	2.8		2.8
Decrease in unrecognized tax benefits that are reasonably possibly over the next twelve-month period (up to)	8.2		8.2
Tax cuts and jobs act of 2017, provisional (benefit) obligation	(1.0)
Tax benefit from decreases in tax liability related to decrease in enacted tax rate	$ 1.8
CDMO Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Tax on gain on divestiture			$ 18.0

PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Pension
Employee benefits
Service cost	$ 814	$ 749	$ 2,629	$ 2,277
Interest cost	2,752	2,663	8,241	8,428
Expected return on plan assets	(3,801)	(3,476)	(11,690)	(10,411)
Amortization of prior service credit	(135)	(134)	(406)	(392)
Amortization of net loss	736	1,017	2,267	3,030
Net periodic cost	366	819	1,041	2,932
Other Postretirement Benefits Plan
Employee benefits
Net periodic cost	$ 0	$ 0	$ 0	$ 0

STOCK-BASED COMPENSATION - Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Stock-based compensation expense
Stock-based compensation	$ 11,820	$ 11,526	$ 35,908	$ 32,902
Cost of revenue
Stock-based compensation expense
Stock-based compensation	1,596	1,700	4,747	4,989
Selling, general and administrative
Stock-based compensation expense
Stock-based compensation	$ 10,224	$ 9,826	$ 31,161	$ 27,913

STOCK-BASED COMPENSATION - Summary of Stock-Based Compensation Grants (Details) shares in Millions	9 Months Ended
	Sep. 29, 2018 $ / shares shares
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	0.5
Stock options weighted average grant date fair value (in dollars per share) \| $ / shares	$ 24.80
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	0.2
Weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 109.15
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	0.2
Weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 117.28
Maximum shares to be awarded under plan (in shares)	0.4

FOREIGN CURRENCY CONTRACT (Details) - Foreign Exchange Forward - Not Designated as Hedging Instrument $ in Thousands	9 Months Ended
	Sep. 29, 2018 USD ($)
Derivatives, Fair Value [Line Items]
Foreign currency contract, term	1 month
Other Current Assets
Derivatives, Fair Value [Line Items]
Notional Amount	$ 28,665
Fair Value	$ 29

COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	9 Months Ended
COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	Sep. 29, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Increase in lease obligations	$ 55.2

RESTRUCTURING AND ASSET IMPAIRMENT - Restructuring Costs by Classification on the Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 29, 2018	Dec. 30, 2017	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	$ 4,675		$ 912	$ 7,169	$ 2,461
Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	35		465	794	1,673
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	4,640		447	6,375	788
Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	4,649		636	7,121	1,976
Severance and Transition Costs \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	30		189	767	1,188
Severance and Transition Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	4,619		447	6,354	788
Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	26		276	48	485
Asset Impairments and Other Costs \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	5		276	27	485
Asset Impairments and Other Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	21		$ 0	21	$ 0
RMS
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	303	$ 18,100		1,630
RMS \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	333			1,472
RMS \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	(30)			158
RMS \| Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	65			808
RMS \| Severance and Transition Costs \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	95			650
RMS \| Severance and Transition Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	(30)			158
RMS \| Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	238			822
RMS \| Asset Impairments and Other Costs \| Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	238			822
RMS \| Asset Impairments and Other Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	$ 0			$ 0

RESTRUCTURING AND ASSET IMPAIRMENT - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 29, 2018	Dec. 30, 2017	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Jun. 30, 2018	Jul. 01, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 4,675		$ 912	$ 7,169	$ 2,461
Severance and retention costs liability	7,062	$ 6,856	7,170	7,062	7,170	$ 6,810	$ 7,010	$ 8,102
Accrued Compensation
Restructuring Cost and Reserve [Line Items]
Severance and retention costs liability	2,600		2,900	2,600	2,900
RMS
Restructuring Cost and Reserve [Line Items]
Restructuring costs	303	18,100		1,630
RMS \| Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs (not expected to exceed)	1,000			1,000
Cash portion of expected amount (up to)				2,500
Asset Impairments and Accelerated Depreciation \| RMS
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 17,700
Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	4,649		636	7,121	1,976
Severance and Transition Costs \| Other Noncurrent Liabilities
Restructuring Cost and Reserve [Line Items]
Severance and retention costs liability	4,400		$ 4,300	4,400	$ 4,300
Severance and Transition Costs \| RMS
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 65			$ 808

RESTRUCTURING AND ASSET IMPAIRMENT - Schedule of Other Restructuring Initiatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 4,675	$ 912	$ 7,169	$ 2,461
Cost of revenue
Restructuring Cost and Reserve [Line Items]
Restructuring costs	35	465	794	1,673
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	4,640	447	6,375	788
Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	4,649	636	7,121	1,976
Severance and Transition Costs \| Cost of revenue
Restructuring Cost and Reserve [Line Items]
Restructuring costs	30	189	767	1,188
Severance and Transition Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	4,619	447	6,354	788
Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	26	276	48	485
Asset Impairments and Other Costs \| Cost of revenue
Restructuring Cost and Reserve [Line Items]
Restructuring costs	5	276	27	485
Asset Impairments and Other Costs \| Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 21	$ 0	$ 21	$ 0

RESTRUCTURING AND ASSET IMPAIRMENT - Severance and Retention Costs by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Total severance and transition costs	$ 4,675	$ 912	$ 7,169	$ 2,461
DSA
Segment Reporting Information [Line Items]
Total severance and transition costs	56	360	1,021	841
Manufacturing
Segment Reporting Information [Line Items]
Total severance and transition costs	0	552	870	1,620
Unallocated corporate
Segment Reporting Information [Line Items]
Total severance and transition costs	$ 4,619	$ 0	$ 5,278	$ 0

RESTRUCTURING AND ASSET IMPAIRMENT - Rollforward of Severance and Transition Costs Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Restructuring Reserve [Roll Forward]
Beginning balance	$ 6,810	$ 7,010	$ 6,856	$ 8,102
Expense	4,714	636	7,929	1,976
Payments / utilization	(4,407)	(676)	(7,544)	(3,506)
Foreign currency adjustments	(55)	200	(179)	598
Ending balance	$ 7,062	$ 7,170	$ 7,062	$ 7,170

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Estimated Revenue Related to Performance Obligations (Details) $ in Thousands	Sep. 29, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-09-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 136,622
Performance obligations expected to be satisfied, expected timing	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 102,437
Performance obligations expected to be satisfied, expected timing	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 12,312
Performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 560
Performance obligations expected to be satisfied, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 251,931
DSA \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-09-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	126,336
DSA \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	82,192
DSA \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	3,299
DSA \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	492
DSA \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	212,319
Manufacturing \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-09-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	10,286
Manufacturing \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	20,245
Manufacturing \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	9,013
Manufacturing \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	68
Manufacturing \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 39,612