Charles River Laboratories International (CRL) 10-Q 8 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 27, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	CHARLES RIVER LABORATORIES INTERNATIONAL INC
Entity Central Index Key	1,100,682
Current Fiscal Year End Date	--12-29
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		48,032,375

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Total revenue	$ 585,301	$ 469,129	$ 1,079,271	$ 914,892
Costs and expenses:
Selling, general and administrative	120,531	93,820	223,903	184,729
Amortization of intangible assets	18,740	9,819	29,008	20,556
Operating income	76,710	81,686	144,539	151,392
Other income (expense):
Interest income	182	161	464	363
Interest expense	(18,643)	(7,403)	(29,834)	(14,386)
Other income, net	12,039	2,472	18,159	17,594
Income from continuing operations, before income taxes	70,288	76,916	133,328	154,963
Provision for income taxes	17,438	22,243	27,210	53,327
Income from continuing operations, net of income taxes	52,850	54,673	106,118	101,636
Income (loss) from discontinued operations, net of income taxes	1,529	(71)	1,506	(75)
Net income	54,379	54,602	107,624	101,561
Less: Net income attributable to noncontrolling interests	670	650	1,284	831
Net income attributable to common shareholders	$ 53,709	$ 53,952	$ 106,340	$ 100,730
Basic:
Continuing operations attributable to common shareholders (in dollars per share)	$ 1.08	$ 1.14	$ 2.18	$ 2.12
Discontinued operations (in dollars per share)	0.03	0	0.03	0
Net income attributable to common shareholders (in dollars per share)	1.11	1.13	2.22	2.12
Diluted:
Continuing operations attributable to common shareholders (in dollars per share)	1.06	1.12	2.14	2.08
Discontinued operations (in dollars per share)	0.03	0	0.03	0
Net income attributable to common shareholders (in dollars per share)	$ 1.10	$ 1.12	$ 2.17	$ 2.08
Service
Total revenue	$ 438,456	$ 329,398	$ 783,910	$ 633,929
Costs and expenses:
Cost of services provided (excluding amortization of intangible assets)	302,304	215,053	546,112	422,220
Product
Total revenue	146,845	139,731	295,361	280,963
Costs and expenses:
Cost of services provided (excluding amortization of intangible assets)	$ 67,016	$ 68,751	$ 135,709	$ 135,995

CONDENSED CONSOLIDATED STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 54,379	$ 54,602	$ 107,624	$ 101,561
Other comprehensive income:
Foreign currency translation adjustment and other	(33,150)	33,451	(7,719)	44,672
Amortization of net loss and prior service benefit included in net periodic cost for pension and other post-retirement benefit plans	790	901	1,249	1,755
Comprehensive income, before income taxes	22,019	88,954	101,154	147,988
Less: Income tax (benefit) expense related to items of other comprehensive income	(2,320)	397	(598)	623
Comprehensive income, net of income taxes	24,339	88,557	101,752	147,365
Less: Comprehensive (loss) income related to noncontrolling interest, net of income taxes	(218)	900	960	1,198
Comprehensive income attributable to common shareholders	$ 24,557	$ 87,657	$ 100,792	$ 146,167

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 192,300	$ 163,794
Trade receivables, net	478,735	430,016
Inventories	124,131	114,956
Prepaid assets	44,531	36,544
Other current assets	49,833	81,315
Total current assets	889,530	826,625
Property, plant and equipment, net	896,273	781,973
Goodwill	1,254,444	804,906
Client relationships and other intangible assets, net	649,136	369,762
Deferred tax assets	27,230	22,654
Other assets	149,270	124,002
Total assets	3,865,883	2,929,922
Current liabilities:
Current portion of long-term debt and capital leases	31,346	30,998
Accounts payable	67,481	77,838
Accrued compensation	104,547	101,044
Deferred revenue	130,393	117,569
Accrued liabilities	110,770	89,780
Other current liabilities	73,603	44,460
Current liabilities of discontinued operations		1,815
Total current liabilities	518,140	463,504
Long-term debt, net and capital leases	1,796,451	1,114,105
Deferred tax liabilities	152,785	89,540
Other long-term liabilities	196,640	194,815
Long-term liabilities of discontinued operations	0	3,942
Total liabilities	2,664,016	1,865,906
Commitments and contingencies (Note 15)
Redeemable noncontrolling interest	16,662	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; 88,221 shares issued and 48,001 shares outstanding as of June 30, 2018, and 87,495 shares issued and 47,402 shares outstanding as of December 30, 2017	882	875
Additional paid-in capital	2,608,522	2,560,192
Retained earnings	399,752	288,658
Treasury stock, at cost, 40,220 shares and 40,093 shares as of June 30, 2018 and December 30, 2017, respectively	(1,673,582)	(1,659,914)
Accumulated other comprehensive loss	(153,608)	(144,731)
Total equity attributable to common shareholders	1,181,966	1,045,080
Noncontrolling interest	3,239	2,327
Total equity	1,185,205	1,047,407
Total liabilities, redeemable noncontrolling interest and equity	3,865,883	2,929,922
Client relationships, net
Current assets:
Client relationships and other intangible assets, net	553,277	301,891
Other intangible assets, net
Current assets:
Client relationships and other intangible assets, net	$ 95,859	$ 67,871

CONDENSED CONSOLIDATED BALANCE5

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares	Jun. 30, 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)	88,221,000	87,495,000
Common stock, shares outstanding (in shares)	48,001,000	47,402,000
Treasury stock (in shares)	40,220,000	40,093,000

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Cash flows relating to operating activities
Net income	$ 107,624	$ 101,561
Income (loss) from discontinued operations, net of income taxes	1,506	(75)
Income from continuing operations, net of income taxes	106,118	101,636
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	76,606	64,210
Stock-based compensation	24,088	21,376
Deferred income taxes	(6,212)	22,951
Gain on venture capital investments	(17,385)	(6,690)
Gain on divestiture	0	(10,577)
Other, net	6,961	1,164
Changes in assets and liabilities:
Trade receivables, net	(19,375)	(26,596)
Inventories	(7,444)	(7,746)
Accounts payable	(12,608)	(6,828)
Accrued compensation	(2,417)	(10,715)
Deferred revenue	(4,331)	(6,260)
Customer contract deposits	37,543	0
Other assets and liabilities, net	2,379	(1,572)
Net cash provided by operating activities	183,923	134,353
Cash flows relating to investing activities
Acquisitions of businesses and assets, net of cash acquired	(821,350)	0
Capital expenditures	(48,939)	(31,917)
Purchases of investments and contributions to venture capital investments	(11,097)	(29,976)
Proceeds from sale of investments	30,406	3,479
Proceeds from divestiture	0	72,462
Other, net	(56)	(22)
Net cash (used in) provided by investing activities	(851,036)	14,026
Cash flows relating to financing activities
Proceeds from long-term debt and revolving credit facility	2,392,568	136,224
Proceeds from exercises of stock options	24,196	29,955
Payments on long-term debt, revolving credit facility, and capital lease obligations	(1,680,207)	(249,973)
Payments on debt financing costs	(18,314)	0
Purchase of treasury stock	(13,668)	(70,820)
Other, net	0	(450)
Net cash provided by (used in) financing activities	704,575	(155,064)
Discontinued operations
Net cash used in operating activities from discontinued operations	(3,731)	(997)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4,697)	6,808
Net change in cash, cash equivalents, and restricted cash	29,034	(874)
Cash, cash equivalents, and restricted cash, beginning of period	166,331	119,894
Cash, cash equivalents, and restricted cash, end of period	195,365	119,020
Supplemental cash flow information:
Cash, cash equivalents, and restricted cash, end of period	$ 166,331	$ 119,894

BASIS OF PRESENTATION

BASIS OF PRESENTATION	6 Months Ended
	Jun. 30, 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 $0.4 million and $0.6 million during the three and six months ended July 1, 2017, respectively. In connection with the impact of Operating income to the Company’s reportable segments for the three months ended July 1, 2017, Research Models and Services (RMS) increased by less than $0.1 million , Discovery and Safety Assessment (DSA) decreased by $0.4 million , Manufacturing Support (Manufacturing) increased by less than $0.1 million , and Unallocated corporate increased by $0.7 million . For the six months ended July 1, 2017, Operating income for RMS decreased by less than $0.1 million , DSA decreased by $0.7 million , Manufacturing increased by less than $0.1 million , and Unallocated corporate increased by $1.3 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 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 Company is still evaluating the impact this standard will have on its 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, working through anticipated changes to systems and 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 by recording a right-to-use asset and a corresponding lease liability.

BUSINESS ACQUISITIONS AND DIVES

BUSINESS ACQUISITIONS AND DIVESTITURE	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
BUSINESS ACQUISITIONS AND DIVESTITURE	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 $800.2 million , net of $27.7 million of cash acquired and a preliminary net working capital adjustment of $1.7 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) 5,627 Property, plant and equipment 128,403 Goodwill 440,372 Definite-lived intangible assets 309,200 Other long-term assets 1,081 Deferred revenue (22,600 ) Current liabilities (32,788 ) Deferred tax liabilities (66,379 ) Other long-term liabilities (2,213 ) Total purchase price allocation $ 800,239 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. 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 $11.7 million and $14.5 million for the three and six months ended June 30, 2018 , respectively, which were primarily included in Selling, general and administrative expenses. MPI Research revenue and operating income for both the three and six months ended June 30, 2018 were $66.6 million and $8.2 million , respectively, since MPI Research was acquired on April 3, 2018 . 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 six months ended June 30, 2018 , these adjustments included additional amortization of intangible assets and depreciation of fixed assets of $9.4 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 six months ended July 1, 2017 , these adjustments included additional amortization of intangible assets and depreciation of fixed assets of $11.4 million , additional interest expense on borrowings of $13.5 million , elimination of intercompany activity and other one-time costs, and the tax impacts of these adjustments. Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Revenue $ 585,297 $ 504,710 $ 1,141,388 $ 1,031,198 Net income attributable to common shareholders 60,161 43,113 109,575 90,968 Earnings per common share Basic $ 1.25 $ 0.91 $ 2.28 $ 1.91 Diluted $ 1.23 $ 0.89 $ 2.24 $ 1.88 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 $4.0 million based on recent exchange rates), based on future performance. The KWS BioTest 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 preliminary purchase price allocation of $22.0 million , net of $1.0 million of cash acquired, 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 18,165 Current liabilities (1,575 ) Deferred revenue (151 ) Long-term liabilities (596 ) Total purchase price allocation $ 22,034 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. 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 businesses 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 $0.5 million in connection with the acquisition for the three and six months ended June 30, 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, subject to certain post-closing adjustments, 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 businesses 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 six months ended June 30, 2018 . 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. As of February 10, 2017 , the carrying amounts of the major classes of assets and liabilities associated with the divestiture of the CDMO business were as follows (in thousands): 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 CUS

REVENUE FROM CONTRACTS WITH CUSTOMERS	6 Months Ended
	Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
REVENUE FROM CONTRACTS WITH CUSTOMERS	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 six months ended June 30, 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 three and six months ended June 30, 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 hour 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 six months ended June 30, 2018 (in thousands): Major Products/Service Lines: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 RMS $ 130,426 $ 264,384 DSA 346,416 606,408 Manufacturing 108,459 208,479 Total revenue $ 585,301 $ 1,079,271 Timing of Revenue Recognition: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 RMS Services and products transferred over time $ 48,804 $ 97,530 Services and products transferred at a point in time 81,622 166,854 DSA Services and products transferred over time 346,226 605,970 Services and products transferred at a point in time 190 438 Manufacturing Services and products transferred over time 32,987 61,558 Services and products transferred at a point in time 75,472 146,921 Total revenue $ 585,301 $ 1,079,271 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 contractual 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 June 30, 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 June 30, 2018 : Revenues 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 $ 116,399 $ 81,946 $ 2,497 $ 491 $ 201,333 Manufacturing 599 293 126 115 1,133 Total $ 116,998 $ 82,239 $ 2,623 $ 606 $ 202,466 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. 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, a contract liability is recorded. 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: June 30, 2018 December 30, 2017 (1) (in thousands) Balances from contracts with customers only: Client receivables $ 372,360 $ 335,839 Contract assets (unbilled revenue) 108,580 96,297 Contract liabilities (current and long-term deferred revenue) 141,720 125,882 Contract liabilities (customer contract deposits) 37,543 — (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 June 30, 2018 , the Company excluded approximately $20 million of unpaid advanced client billings from both client receivables and deferred revenue and approximately $38 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 six months ended June 30, 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 six month period ended June 30, 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 $79 million of unbilled revenue as of December 30, 2017 was billed during the six month period ended June 30, 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 $103 million of contract liabilities as of December 30, 2017 were recognized as revenue during the six month period ended June 30, 2018 .

SEGMENT INFORMATION

SEGMENT INFORMATION	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
SEGMENT INFORMATION	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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) RMS Revenue $ 130,426 $ 124,002 $ 264,384 $ 251,163 Operating income 34,245 33,594 72,772 71,284 Depreciation and amortization 4,901 4,945 9,754 10,037 Capital expenditures 5,314 4,404 9,939 7,007 DSA Revenue $ 346,416 $ 252,092 $ 606,408 $ 479,850 Operating income 56,623 51,335 97,482 89,670 Depreciation and amortization 31,042 18,965 51,829 38,334 Capital expenditures 10,894 7,102 23,696 15,425 Manufacturing Revenue $ 108,459 $ 93,035 $ 208,479 $ 183,879 Operating income 34,115 29,043 62,638 55,643 Depreciation and amortization 5,868 5,787 11,604 11,749 Capital expenditures 3,188 1,939 10,022 4,231 For the three months ended June 30, 2018 and July 1, 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 June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Total reportable segments $ 124,983 $ 113,972 $ 41,811 $ 29,697 $ 19,396 $ 13,445 Unallocated corporate (48,273 ) (32,286 ) 1,585 2,102 1,817 2,552 Total consolidated $ 76,710 $ 81,686 $ 43,396 $ 31,799 $ 21,213 $ 15,997 For the six months ended June 30, 2018 and July 1, 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 June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Total reportable segments $ 232,892 $ 216,597 $ 73,187 $ 60,120 $ 43,657 $ 26,663 Unallocated corporate (88,353 ) (65,205 ) 3,419 4,090 5,282 5,254 Total consolidated $ 144,539 $ 151,392 $ 76,606 $ 64,210 $ 48,939 $ 31,917 Revenue for each significant product or service offering is as follows: Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) RMS $ 130,426 $ 124,002 $ 264,384 $ 251,163 DSA 346,416 252,092 606,408 479,850 Manufacturing 108,459 93,035 208,479 183,879 Total revenue $ 585,301 $ 469,129 $ 1,079,271 $ 914,892 A summary of unallocated corporate expense consists of the following : Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Stock-based compensation $ 9,616 $ 7,421 $ 16,607 $ 13,004 Compensation, benefits, and other employee-related expenses 15,315 10,365 35,911 24,746 External consulting and other service expenses 5,010 4,085 7,944 9,852 Information technology 3,190 3,617 5,654 6,010 Depreciation 1,585 2,102 3,419 4,090 Acquisition and integration 11,692 1,191 14,556 1,212 Other general unallocated corporate 1,865 3,505 4,262 6,291 Total unallocated corporate expense $ 48,273 $ 32,286 $ 88,353 $ 65,205 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: June 30, 2018 $ 334,016 $ 161,656 $ 51,559 $ 36,235 $ 1,835 $ 585,301 July 1, 2017 244,923 139,620 53,242 31,046 298 469,129 Six Months Ended: June 30, 2018 $ 582,996 $ 322,482 $ 100,137 $ 70,755 $ 2,901 $ 1,079,271 July 1, 2017 476,234 276,501 100,429 61,141 587 914,892 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 INFO

SUPPLEMENTAL BALANCE SHEET INFORMATION	6 Months Ended
	Jun. 30, 2018
Supplemental Balance Sheet Information [Abstract]
SUPPLEMENTAL BALANCE SHEET INFORMATION	SUPPLEMENTAL BALANCE SHEET INFORMATION The composition of trade receivables, net is as follows: June 30, 2018 December 30, 2017 (in thousands) Client receivables $ 372,360 $ 335,839 Unbilled revenue 108,580 96,297 Total 480,940 432,136 Less: Allowance for doubtful accounts (2,205 ) (2,120 ) Trade receivables, net $ 478,735 $ 430,016 The composition of inventories is as follows: June 30, 2018 December 30, 2017 (in thousands) Raw materials and supplies $ 21,160 $ 19,858 Work in process 20,084 18,200 Finished products 82,887 76,898 Inventories $ 124,131 $ 114,956 The composition of other current assets is as follows: June 30, 2018 December 30, 2017 (in thousands) Investments $ 903 $ 28,489 Prepaid income taxes 48,037 52,234 Restricted cash 593 592 Other 300 — Other current assets $ 49,833 $ 81,315 The composition of other assets is as follows: June 30, 2018 December 30, 2017 (in thousands) Life insurance policies $ 34,919 $ 34,008 Venture capital investments 91,323 71,101 Restricted cash 2,472 1,945 Other 20,556 16,948 Other assets $ 149,270 $ 124,002 The composition of other current liabilities is as follows: June 30, 2018 December 30, 2017 (in thousands) Accrued income taxes $ 26,915 $ 43,250 Customer contract deposits 37,543 — Other 9,145 1,210 Other current liabilities $ 73,603 $ 44,460 The composition of other long-term liabilities is as follows: June 30, 2018 December 30, 2017 (in thousands) U.S. Transition Tax $ 61,038 $ 61,038 Long-term pension liability 47,803 52,364 Accrued executive supplemental life insurance retirement plan and deferred compensation plan 38,215 37,582 Other 49,584 43,831 Other long-term liabilities $ 196,640 $ 194,815

VENTURE CAPITAL INVESTMENTS

VENTURE CAPITAL INVESTMENTS	6 Months Ended
	Jun. 30, 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. 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 June 30, 2018 was $109.1 million , of which the Company funded $60.7 million through that date. The Company received dividends totaling $1.5 million and zero for the three months ended June 30, 2018 and July 1, 2017 , respectively. The Company received dividends totaling $8.5 million and $4.4 million for the six months ended June 30, 2018 and July 1, 2017 , respectively. The Company recognized gains of $10.9 million and $2.5 million related to the venture capital investments for the three months ended June 30, 2018 and July 1, 2017 , respectively. The Company recognized gains of $17.4 million and $6.7 million related to the venture capital investments for the six months ended June 30, 2018 and July 1, 2017 , respectively.

FAIR VALUE

FAIR VALUE	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE	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 six months ended June 30, 2018 and July 1, 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: June 30, 2018 Level 1 Level 2 Level 3 Total (in thousands) Cash equivalents $ — $ 532 $ — $ 532 Other assets: Life insurance policies — 26,976 — 26,976 Total assets measured at fair value $ — $ 27,508 $ — $ 27,508 Other current liabilities: Contingent consideration $ — $ — $ 2,880 $ 2,880 Total liabilities measured at fair value $ — $ — $ 2,880 $ 2,880 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.” Six Months Ended June 30, 2018 July 1, 2017 (in thousands) Beginning balance $ 298 $ 3,621 Additions 2,746 — Payments — (406 ) Foreign Currency Translation (164 ) — Reversal of previously recorded contingent liability — (14 ) Ending balance $ 2,880 $ 3,201 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.

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	6 Months Ended
	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	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 June 30, 2018 (in thousands) RMS $ 58,122 $ — $ (446 ) $ 57,676 DSA 605,176 458,903 (6,565 ) 1,057,514 Manufacturing 141,608 — (2,354 ) 139,254 Total $ 804,906 $ 458,903 $ (9,365 ) $ 1,254,444 The increase in goodwill during the six months ended June 30, 2018 related primarily to the acquisitions of MPI Research and KWS BioTest in the DSA reportable segment, and the impact of foreign exchange . Intangible Assets, Net The following table displays intangible assets, net by major class: June 30, 2018 December 30, 2017 Gross Accumulated Amortization Net Gross Accumulated Amortization Net (in thousands) Backlog $ 20,900 $ (6,092 ) $ 14,808 $ 8,111 $ (8,111 ) $ — Technology 103,361 (34,686 ) 68,675 81,309 (27,157 ) 54,152 Trademarks and trade names 8,541 (4,579 ) 3,962 8,661 (4,562 ) 4,099 Other 17,319 (8,905 ) 8,414 17,465 (7,845 ) 9,620 Other intangible assets 150,121 (54,262 ) 95,859 115,546 (47,675 ) 67,871 Client relationships 799,352 (246,075 ) 553,277 540,425 (238,534 ) 301,891 Intangible assets $ 949,473 $ (300,337 ) $ 649,136 $ 655,971 $ (286,209 ) $ 369,762 The increase in intangible assets, net during the six months ended June 30, 2018 related primarily to the acquisitions of MPI Research and KWS BioTest in the DSA reportable segment.

LONG-TERM DEBT AND CAPITAL LEAS

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS	LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS Long-Term Debt Long-term debt, net consists of the following: June 30, 2018 December 30, 2017 (in thousands) Term loans $ 750,000 $ 601,250 Revolving facility 546,834 500,997 Senior Notes 500,000 — Other long-term debt 18,221 18,292 Total debt 1,815,055 1,120,539 Less: Current portion of long-term debt (28,230 ) (28,546 ) Long-term debt 1,786,825 1,091,993 Debt discount and debt issuance costs (17,890 ) (5,770 ) Long-term debt, net $ 1,768,935 $ 1,086,223 As of June 30, 2018 and December 30, 2017 , the weighted average interest rate on the Company’s debt was 3.24% 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 June 30, 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 June 30, 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 $30.6 million and $30.3 million as of June 30, 2018 and December 30, 2017 , respectively.

EQUITY AND NONCONTROLLING INTER

EQUITY AND NONCONTROLLING INTEREST	6 Months Ended
	Jun. 30, 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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Numerator: Income from continuing operations, net of income taxes $ 52,850 $ 54,673 $ 106,118 $ 101,636 Income (loss) from discontinued operations, net of income taxes 1,529 (71 ) 1,506 (75 ) Less: Net income attributable to noncontrolling interests 670 650 1,284 831 Net income attributable to common shareholders $ 53,709 $ 53,952 $ 106,340 $ 100,730 Denominator: Weighted-average shares outstanding - Basic 48,198 47,591 47,992 47,569 Effect of dilutive securities: Stock options, restricted stock units, performance share units and restricted stock 845 751 974 835 Weighted-average shares outstanding - Diluted 49,043 48,342 48,966 48,404 Options to purchase 0.5 million and 0.6 million shares for the three months ended June 30, 2018 and July 1, 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 six months ended June 30, 2018 and July 1, 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 both the six months ended June 30, 2018 and July 1, 2017 excluded the impact of 1.1 million shares of non-vested restricted stock and RSUs. Treasury Shares During the six months ended June 30, 2018 , the Company did no t repurchase any shares under its authorized stock repurchase program. During the six months ended July 1, 2017 , the Company repurchased 0.6 million shares totaling $54.6 million under its $1.3 billion authorized stock repurchase program. As of June 30, 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 six months ended June 30, 2018 and July 1, 2017 , the Company acquired 0.1 million shares for $13.7 million and 0.2 million shares for $16.3 million , respectively, from such netting. 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 (7,394 ) — (7,394 ) Amounts reclassified from accumulated other comprehensive loss — 1,249 1,249 Net current period other comprehensive (loss) income (7,394 ) 1,249 (6,145 ) 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 (906 ) 308 (598 ) June 30, 2018 $ (84,033 ) $ (69,575 ) $ (153,608 ) 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 six months ended June 30, 2018 and July 1, 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 ( $17.1 million as of June 30, 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: Six Months Ended June 30, 2018 July 1, 2017 (in thousands) Beginning balance $ 16,609 $ 14,659 Total gains or losses (realized/unrealized): Net income attributable to noncontrolling interest 377 291 Foreign currency translation (324 ) 367 Ending balance $ 16,662 $ 15,317

INCOME TAXES

INCOME TAXES	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company’s effective tax rates for the three months ended June 30, 2018 and July 1, 2017 were 24.8% and 28.9% , respectively. The Company’s effective tax rates for the six months ended June 30, 2018 and July 1, 2017 were 20.4% and 34.4% , respectively. For the three months ended June 30, 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, partially offset with non-deductible transaction costs associated with the acquisition of MPI Research. For the six months ended June 30, 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 June 30, 2018 , the Company’s unrecognized tax benefits decreased by $1.2 million to $19.8 million , primarily due to settlement of prior period positions with tax authorities, offset with an additional quarter of Canadian Scientific Research and Experimental Development Credit reserves. For the three months ended June 30, 2018 , the unrecognized income tax benefits that would impact the effective tax rate decreased by $1.4 million to $18.0 million , for the same reasons listed above. The accrued interest on unrecognized tax benefits was $2.7 million at June 30, 2018 . The Company estimates that it is reasonably possible that the unrecognized tax benefits will decrease by up to $0.7 million over the next twelve-month period, primarily due to the outcome of pending tax audits. The Company continues to monitor its accounting for the elements of U.S. Tax Reform enacted in December 2017. The Company has made reasonable estimates of the effects of U.S. Tax Reform to its consolidated financial statements based on guidance and regulations released by the Internal Revenue Service. The SEC has issued SAB 118, which allows for a measurement period through December 2018 to finalize the recording of the related tax impacts. The Company has not recorded any measurement period adjustments during the six months ended June 30, 2018 to the provisional amounts recorded in the fourth quarter of fiscal year 2017. 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, and France. 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-RETIREME

PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS	6 Months Ended
	Jun. 30, 2018
Retirement Benefits [Abstract]
PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS	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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Service cost $ 969 $ 774 $ 1,815 $ 1,528 Interest cost 2,656 2,939 5,489 5,765 Expected return on plan assets (4,012 ) (3,485 ) (7,889 ) (6,935 ) Amortization of prior service credit (90 ) (139 ) (271 ) (258 ) Amortization of net loss 886 1,047 1,531 2,013 Net periodic cost $ 409 $ 1,136 $ 675 $ 2,113 The net periodic cost for the Company’s other post-retirement benefit plan for the three and six months ended June 30, 2018 and July 1, 2017 was not significant.

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Cost of revenue $ 1,738 $ 1,743 $ 3,151 $ 3,289 Selling, general and administrative 11,809 10,147 20,937 18,087 Stock-based compensation $ 13,547 $ 11,890 $ 24,088 $ 21,376 During the six months ended June 30, 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 $109.09 , 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 six months ended June 30, 2018 is 0.4 million .

FOREIGN CURRENCY CONTRACTS

FOREIGN CURRENCY CONTRACTS	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
FOREIGN CURRENCY CONTRACTS	FOREIGN CURRENCY CONTRACTS The Company enters into foreign exchange forward contracts to limit its foreign currency exposure related to intercompany loans that are not of a long-term investment nature. These contracts are recorded at fair value in the Company’s unaudited condensed consolidated balance sheets and are not designated as hedging instruments. Any gains or losses on such contracts are immediately recognized in Other income, net, and are largely offset by the remeasurement of the underlying intercompany loan balances. The Company did not have any foreign currency contracts open as of June 30, 2018 and December 30, 2017 .

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	6 Months Ended
	Jun. 30, 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 six months ended June 30, 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 $40.1 million during the six months ended June 30, 2018 .

RESTRUCTURING AND ASSET IMPAIRM

RESTRUCTURING AND ASSET IMPAIRMENT	6 Months Ended
	Jun. 30, 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 six months ended June 30, 2018 . Three Months Ended Six Months Ended June 30, 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) $ 202 $ 69 $ 271 $ 555 $ 584 $ 1,139 Selling, general and administrative 18 — 18 188 — 188 Total $ 220 $ 69 $ 289 $ 743 $ 584 $ 1,327 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 six months ended June 30, 2018 were $0.3 million and $1.3 million , respectively. The remaining restructuring costs related to this initiative in 2018 are not expected to exceed $1.5 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 $3 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 reductions, 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 six months ended June 30, 2018 and July 1, 2017 . Three Months Ended June 30, 2018 July 1, 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) $ 174 $ — $ 174 $ 76 $ 149 $ 225 Selling, general and administrative 1,682 — 1,682 247 — 247 Total $ 1,856 $ — $ 1,856 $ 323 $ 149 $ 472 Six Months Ended June 30, 2018 July 1, 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) $ 737 $ 22 $ 759 $ 999 $ 209 $ 1,208 Selling, general and administrative 1,735 — 1,735 341 — 341 Total $ 2,472 $ 22 $ 2,494 $ 1,340 $ 209 $ 1,549 The following table presents restructuring costs by reportable segment for these productivity improvement initiatives: Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) DSA $ 1,197 $ 225 $ 965 $ 481 Manufacturing — 247 870 1,068 Unallocated corporate 659 — 659 — Total $ 1,856 $ 472 $ 2,494 $ 1,549 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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Beginning balance $ 7,053 $ 6,531 $ 6,856 $ 8,102 Expense 2,076 323 3,215 1,340 Payments / utilization (1,990 ) (140 ) (3,138 ) (2,830 ) Foreign currency adjustments (329 ) 296 (123 ) 398 Ending balance $ 6,810 $ 7,010 $ 6,810 $ 7,010 As of June 30, 2018 and July 1, 2017 , $2.6 million and $2.5 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 $4.2 million and $4.5 million , respectively, were included in other long-term liabilities within the Company’s unaudited condensed consolidated balance sheets.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	6 Months Ended
	Jun. 30, 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 $0.4 million and $0.6 million during the three and six months ended July 1, 2017, respectively. In connection with the impact of Operating income to the Company’s reportable segments for the three months ended July 1, 2017, Research Models and Services (RMS) increased by less than $0.1 million , Discovery and Safety Assessment (DSA) decreased by $0.4 million , Manufacturing Support (Manufacturing) increased by less than $0.1 million , and Unallocated corporate increased by $0.7 million . For the six months ended July 1, 2017, Operating income for RMS decreased by less than $0.1 million , DSA decreased by $0.7 million , Manufacturing increased by less than $0.1 million , and Unallocated corporate increased by $1.3 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 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 Company is still evaluating the impact this standard will have on its 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, working through anticipated changes to systems and 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 by recording a right-to-use asset and a corresponding lease liability.

BUSINESS ACQUISITIONS AND DIV24

BUSINESS ACQUISITIONS AND DIVESTITURE (Tables)	6 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Summary of Purchase Price Allocation	The preliminary purchase allocation of $800.2 million , net of $27.7 million of cash acquired and a preliminary net working capital adjustment of $1.7 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) 5,627 Property, plant and equipment 128,403 Goodwill 440,372 Definite-lived intangible assets 309,200 Other long-term assets 1,081 Deferred revenue (22,600 ) Current liabilities (32,788 ) Deferred tax liabilities (66,379 ) Other long-term liabilities (2,213 ) Total purchase price allocation $ 800,239 The preliminary purchase price allocation of $22.0 million , net of $1.0 million of cash acquired, 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 18,165 Current liabilities (1,575 ) Deferred revenue (151 ) Long-term liabilities (596 ) Total purchase price allocation $ 22,034 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
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	As of February 10, 2017 , the carrying amounts of the major classes of assets and liabilities associated with the divestiture of the CDMO business were as follows (in thousands): 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
Schedule of Business Acquisition, Pro Forma Information	For the six months ended July 1, 2017 , these adjustments included additional amortization of intangible assets and depreciation of fixed assets of $11.4 million , additional interest expense on borrowings of $13.5 million , elimination of intercompany activity and other one-time costs, and the tax impacts of these adjustments. Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Revenue $ 585,297 $ 504,710 $ 1,141,388 $ 1,031,198 Net income attributable to common shareholders 60,161 43,113 109,575 90,968 Earnings per common share Basic $ 1.25 $ 0.91 $ 2.28 $ 1.91 Diluted $ 1.23 $ 0.89 $ 2.24 $ 1.88

REVENUE FROM CONTRACTS WITH C25

REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)	6 Months Ended
	Jun. 30, 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 six months ended June 30, 2018 (in thousands): Major Products/Service Lines: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 RMS $ 130,426 $ 264,384 DSA 346,416 606,408 Manufacturing 108,459 208,479 Total revenue $ 585,301 $ 1,079,271 Timing of Revenue Recognition: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 RMS Services and products transferred over time $ 48,804 $ 97,530 Services and products transferred at a point in time 81,622 166,854 DSA Services and products transferred over time 346,226 605,970 Services and products transferred at a point in time 190 438 Manufacturing Services and products transferred over time 32,987 61,558 Services and products transferred at a point in time 75,472 146,921 Total revenue $ 585,301 $ 1,079,271 Revenue for each significant product or service offering is as follows: Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) RMS $ 130,426 $ 124,002 $ 264,384 $ 251,163 DSA 346,416 252,092 606,408 479,850 Manufacturing 108,459 93,035 208,479 183,879 Total revenue $ 585,301 $ 469,129 $ 1,079,271 $ 914,892 Revenue by geographic area is as follows: U.S. Europe Canada Asia Pacific Other Consolidated (in thousands) Three Months Ended: June 30, 2018 $ 334,016 $ 161,656 $ 51,559 $ 36,235 $ 1,835 $ 585,301 July 1, 2017 244,923 139,620 53,242 31,046 298 469,129 Six Months Ended: June 30, 2018 $ 582,996 $ 322,482 $ 100,137 $ 70,755 $ 2,901 $ 1,079,271 July 1, 2017 476,234 276,501 100,429 61,141 587 914,892
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 June 30, 2018 : Revenues 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 $ 116,399 $ 81,946 $ 2,497 $ 491 $ 201,333 Manufacturing 599 293 126 115 1,133 Total $ 116,998 $ 82,239 $ 2,623 $ 606 $ 202,466
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: June 30, 2018 December 30, 2017 (1) (in thousands) Balances from contracts with customers only: Client receivables $ 372,360 $ 335,839 Contract assets (unbilled revenue) 108,580 96,297 Contract liabilities (current and long-term deferred revenue) 141,720 125,882 Contract liabilities (customer contract deposits) 37,543 — (1) The beginning balance as of December 30, 2017 is presented under the guidance of ASC 605.

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	6 Months Ended
	Jun. 30, 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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) RMS Revenue $ 130,426 $ 124,002 $ 264,384 $ 251,163 Operating income 34,245 33,594 72,772 71,284 Depreciation and amortization 4,901 4,945 9,754 10,037 Capital expenditures 5,314 4,404 9,939 7,007 DSA Revenue $ 346,416 $ 252,092 $ 606,408 $ 479,850 Operating income 56,623 51,335 97,482 89,670 Depreciation and amortization 31,042 18,965 51,829 38,334 Capital expenditures 10,894 7,102 23,696 15,425 Manufacturing Revenue $ 108,459 $ 93,035 $ 208,479 $ 183,879 Operating income 34,115 29,043 62,638 55,643 Depreciation and amortization 5,868 5,787 11,604 11,749 Capital expenditures 3,188 1,939 10,022 4,231
Reconciliation of Segment Operating Income to Consolidated Operating Income	For the three months ended June 30, 2018 and July 1, 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 June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Total reportable segments $ 124,983 $ 113,972 $ 41,811 $ 29,697 $ 19,396 $ 13,445 Unallocated corporate (48,273 ) (32,286 ) 1,585 2,102 1,817 2,552 Total consolidated $ 76,710 $ 81,686 $ 43,396 $ 31,799 $ 21,213 $ 15,997 For the six months ended June 30, 2018 and July 1, 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 June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Total reportable segments $ 232,892 $ 216,597 $ 73,187 $ 60,120 $ 43,657 $ 26,663 Unallocated corporate (88,353 ) (65,205 ) 3,419 4,090 5,282 5,254 Total consolidated $ 144,539 $ 151,392 $ 76,606 $ 64,210 $ 48,939 $ 31,917
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 six months ended June 30, 2018 (in thousands): Major Products/Service Lines: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 RMS $ 130,426 $ 264,384 DSA 346,416 606,408 Manufacturing 108,459 208,479 Total revenue $ 585,301 $ 1,079,271 Timing of Revenue Recognition: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 RMS Services and products transferred over time $ 48,804 $ 97,530 Services and products transferred at a point in time 81,622 166,854 DSA Services and products transferred over time 346,226 605,970 Services and products transferred at a point in time 190 438 Manufacturing Services and products transferred over time 32,987 61,558 Services and products transferred at a point in time 75,472 146,921 Total revenue $ 585,301 $ 1,079,271 Revenue for each significant product or service offering is as follows: Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) RMS $ 130,426 $ 124,002 $ 264,384 $ 251,163 DSA 346,416 252,092 606,408 479,850 Manufacturing 108,459 93,035 208,479 183,879 Total revenue $ 585,301 $ 469,129 $ 1,079,271 $ 914,892 Revenue by geographic area is as follows: U.S. Europe Canada Asia Pacific Other Consolidated (in thousands) Three Months Ended: June 30, 2018 $ 334,016 $ 161,656 $ 51,559 $ 36,235 $ 1,835 $ 585,301 July 1, 2017 244,923 139,620 53,242 31,046 298 469,129 Six Months Ended: June 30, 2018 $ 582,996 $ 322,482 $ 100,137 $ 70,755 $ 2,901 $ 1,079,271 July 1, 2017 476,234 276,501 100,429 61,141 587 914,892
Summary of Unallocated Corporate Overhead	A summary of unallocated corporate expense consists of the following : Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Stock-based compensation $ 9,616 $ 7,421 $ 16,607 $ 13,004 Compensation, benefits, and other employee-related expenses 15,315 10,365 35,911 24,746 External consulting and other service expenses 5,010 4,085 7,944 9,852 Information technology 3,190 3,617 5,654 6,010 Depreciation 1,585 2,102 3,419 4,090 Acquisition and integration 11,692 1,191 14,556 1,212 Other general unallocated corporate 1,865 3,505 4,262 6,291 Total unallocated corporate expense $ 48,273 $ 32,286 $ 88,353 $ 65,205

SUPPLEMENTAL BALANCE SHEET IN27

SUPPLEMENTAL BALANCE SHEET INFORMATION (Tables)	6 Months Ended
	Jun. 30, 2018
Supplemental Balance Sheet Information [Abstract]
Composition of Net Trade Receivables	The composition of trade receivables, net is as follows: June 30, 2018 December 30, 2017 (in thousands) Client receivables $ 372,360 $ 335,839 Unbilled revenue 108,580 96,297 Total 480,940 432,136 Less: Allowance for doubtful accounts (2,205 ) (2,120 ) Trade receivables, net $ 478,735 $ 430,016
Composition of Inventories	The composition of inventories is as follows: June 30, 2018 December 30, 2017 (in thousands) Raw materials and supplies $ 21,160 $ 19,858 Work in process 20,084 18,200 Finished products 82,887 76,898 Inventories $ 124,131 $ 114,956
Composition of Other Current Assets	The composition of other current assets is as follows: June 30, 2018 December 30, 2017 (in thousands) Investments $ 903 $ 28,489 Prepaid income taxes 48,037 52,234 Restricted cash 593 592 Other 300 — Other current assets $ 49,833 $ 81,315
Composition of Other Assets	The composition of other assets is as follows: June 30, 2018 December 30, 2017 (in thousands) Life insurance policies $ 34,919 $ 34,008 Venture capital investments 91,323 71,101 Restricted cash 2,472 1,945 Other 20,556 16,948 Other assets $ 149,270 $ 124,002
Composition of Other Current Liabilities	The composition of other current liabilities is as follows: June 30, 2018 December 30, 2017 (in thousands) Accrued income taxes $ 26,915 $ 43,250 Customer contract deposits 37,543 — Other 9,145 1,210 Other current liabilities $ 73,603 $ 44,460
Composition of Other Long-Term Liabilities	The composition of other long-term liabilities is as follows: June 30, 2018 December 30, 2017 (in thousands) U.S. Transition Tax $ 61,038 $ 61,038 Long-term pension liability 47,803 52,364 Accrued executive supplemental life insurance retirement plan and deferred compensation plan 38,215 37,582 Other 49,584 43,831 Other long-term liabilities $ 196,640 $ 194,815

FAIR VALUE (Tables)

FAIR VALUE (Tables)	6 Months Ended
	Jun. 30, 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: June 30, 2018 Level 1 Level 2 Level 3 Total (in thousands) Cash equivalents $ — $ 532 $ — $ 532 Other assets: Life insurance policies — 26,976 — 26,976 Total assets measured at fair value $ — $ 27,508 $ — $ 27,508 Other current liabilities: Contingent consideration $ — $ — $ 2,880 $ 2,880 Total liabilities measured at fair value $ — $ — $ 2,880 $ 2,880 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.” Six Months Ended June 30, 2018 July 1, 2017 (in thousands) Beginning balance $ 298 $ 3,621 Additions 2,746 — Payments — (406 ) Foreign Currency Translation (164 ) — Reversal of previously recorded contingent liability — (14 ) Ending balance $ 2,880 $ 3,201

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	6 Months Ended
	Jun. 30, 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 June 30, 2018 (in thousands) RMS $ 58,122 $ — $ (446 ) $ 57,676 DSA 605,176 458,903 (6,565 ) 1,057,514 Manufacturing 141,608 — (2,354 ) 139,254 Total $ 804,906 $ 458,903 $ (9,365 ) $ 1,254,444
Schedule of Intangible Assets	The following table displays intangible assets, net by major class: June 30, 2018 December 30, 2017 Gross Accumulated Amortization Net Gross Accumulated Amortization Net (in thousands) Backlog $ 20,900 $ (6,092 ) $ 14,808 $ 8,111 $ (8,111 ) $ — Technology 103,361 (34,686 ) 68,675 81,309 (27,157 ) 54,152 Trademarks and trade names 8,541 (4,579 ) 3,962 8,661 (4,562 ) 4,099 Other 17,319 (8,905 ) 8,414 17,465 (7,845 ) 9,620 Other intangible assets 150,121 (54,262 ) 95,859 115,546 (47,675 ) 67,871 Client relationships 799,352 (246,075 ) 553,277 540,425 (238,534 ) 301,891 Intangible assets $ 949,473 $ (300,337 ) $ 649,136 $ 655,971 $ (286,209 ) $ 369,762

LONG-TERM DEBT AND CAPITAL LE30

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS (Tables)	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Schedule of Debt	Long-term debt, net consists of the following: June 30, 2018 December 30, 2017 (in thousands) Term loans $ 750,000 $ 601,250 Revolving facility 546,834 500,997 Senior Notes 500,000 — Other long-term debt 18,221 18,292 Total debt 1,815,055 1,120,539 Less: Current portion of long-term debt (28,230 ) (28,546 ) Long-term debt 1,786,825 1,091,993 Debt discount and debt issuance costs (17,890 ) (5,770 ) Long-term debt, net $ 1,768,935 $ 1,086,223

EQUITY AND NONCONTROLLING INT31

EQUITY AND NONCONTROLLING INTEREST (Tables)	6 Months Ended
	Jun. 30, 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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Numerator: Income from continuing operations, net of income taxes $ 52,850 $ 54,673 $ 106,118 $ 101,636 Income (loss) from discontinued operations, net of income taxes 1,529 (71 ) 1,506 (75 ) Less: Net income attributable to noncontrolling interests 670 650 1,284 831 Net income attributable to common shareholders $ 53,709 $ 53,952 $ 106,340 $ 100,730 Denominator: Weighted-average shares outstanding - Basic 48,198 47,591 47,992 47,569 Effect of dilutive securities: Stock options, restricted stock units, performance share units and restricted stock 845 751 974 835 Weighted-average shares outstanding - Diluted 49,043 48,342 48,966 48,404
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 (7,394 ) — (7,394 ) Amounts reclassified from accumulated other comprehensive loss — 1,249 1,249 Net current period other comprehensive (loss) income (7,394 ) 1,249 (6,145 ) 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 (906 ) 308 (598 ) June 30, 2018 $ (84,033 ) $ (69,575 ) $ (153,608 )
Rollforward Redeemable Noncontrolling Interest	The following table provides a rollforward of the activity related to the Company’s redeemable noncontrolling interest: Six Months Ended June 30, 2018 July 1, 2017 (in thousands) Beginning balance $ 16,609 $ 14,659 Total gains or losses (realized/unrealized): Net income attributable to noncontrolling interest 377 291 Foreign currency translation (324 ) 367 Ending balance $ 16,662 $ 15,317

PENSION AND OTHER POST-RETIRE32

PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS (Tables)	6 Months Ended
	Jun. 30, 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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Service cost $ 969 $ 774 $ 1,815 $ 1,528 Interest cost 2,656 2,939 5,489 5,765 Expected return on plan assets (4,012 ) (3,485 ) (7,889 ) (6,935 ) Amortization of prior service credit (90 ) (139 ) (271 ) (258 ) Amortization of net loss 886 1,047 1,531 2,013 Net periodic cost $ 409 $ 1,136 $ 675 $ 2,113

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	6 Months Ended
	Jun. 30, 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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Cost of revenue $ 1,738 $ 1,743 $ 3,151 $ 3,289 Selling, general and administrative 11,809 10,147 20,937 18,087 Stock-based compensation $ 13,547 $ 11,890 $ 24,088 $ 21,376

RESTRUCTURING AND ASSET IMPAI34

RESTRUCTURING AND ASSET IMPAIRMENT (Tables)	6 Months Ended
	Jun. 30, 2018
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Costs	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 six months ended June 30, 2018 . Three Months Ended Six Months Ended June 30, 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) $ 202 $ 69 $ 271 $ 555 $ 584 $ 1,139 Selling, general and administrative 18 — 18 188 — 188 Total $ 220 $ 69 $ 289 $ 743 $ 584 $ 1,327 The following table presents restructuring costs by reportable segment for these productivity improvement initiatives: Three Months Ended Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) DSA $ 1,197 $ 225 $ 965 $ 481 Manufacturing — 247 870 1,068 Unallocated corporate 659 — 659 — Total $ 1,856 $ 472 $ 2,494 $ 1,549 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 six months ended June 30, 2018 and July 1, 2017 . Three Months Ended June 30, 2018 July 1, 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) $ 174 $ — $ 174 $ 76 $ 149 $ 225 Selling, general and administrative 1,682 — 1,682 247 — 247 Total $ 1,856 $ — $ 1,856 $ 323 $ 149 $ 472 Six Months Ended June 30, 2018 July 1, 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) $ 737 $ 22 $ 759 $ 999 $ 209 $ 1,208 Selling, general and administrative 1,735 — 1,735 341 — 341 Total $ 2,472 $ 22 $ 2,494 $ 1,340 $ 209 $ 1,549
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 Six Months Ended June 30, 2018 July 1, 2017 June 30, 2018 July 1, 2017 (in thousands) Beginning balance $ 7,053 $ 6,531 $ 6,856 $ 8,102 Expense 2,076 323 3,215 1,340 Payments / utilization (1,990 ) (140 ) (3,138 ) (2,830 ) Foreign currency adjustments (329 ) 296 (123 ) 398 Ending balance $ 6,810 $ 7,010 $ 6,810 $ 7,010

BASIS OF PRESENTATION (Details)

BASIS OF PRESENTATION (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 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	$ 76,710	$ 81,686	144,539	$ 151,392
Adjustments to other assets as a result of adoption of new accounting guidance	149,270		149,270		$ 124,002
Adjustment to retained earnings as a result of newly adopted accounting guidance	399,752		399,752		288,658
Adjustment to deferred tax assets as a result of newly adopted accounting guidance	27,230		27,230		$ 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		400		600
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	34,245	33,594	72,772	71,284
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	56,623	51,335	97,482	89,670
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		(400)		(700)
Manufacturing
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustments to operating income related to adoption of new accounting guidance	34,115	29,043	62,638	55,643
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	$ (48,273)	(32,286)	$ (88,353)	(65,205)
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		$ 700		$ 1,300

BUSINESS ACQUISITIONS AND DIV36

BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Additional Information (Details) - USD ($)	Apr. 03, 2018	Jun. 30, 2018	Jun. 30, 2018	Jul. 01, 2017	Mar. 26, 2018
Credit facility | $2.3 Billion Credit Facility
Business Acquisition [Line Items]
Credit facility					$ 2,300,000,000
MPI Research
Business Acquisition [Line Items]
Purchase price	$ 829,700,000
Purchase price allocation	800,239,000
Cash acquired	27,700,000
Adjustments related to prior period	1,700,000
Goodwill, amount expected to be deductible for tax purposes	$ 4,100,000
Integration related costs and transaction costs		$ 11,700,000	$ 14,500,000
Pro forma revenue since acquisition date		66,600,000
Pro forma operating income since acquisition date		$ 8,200,000
Depreciation and Amortization Expense | MPI Research
Business Acquisition [Line Items]
Adjustments related to prior period			9,400,000	$ 11,400,000
Interest Expense | MPI Research
Business Acquisition [Line Items]
Adjustments related to prior period			$ 2,800,000	$ 13,500,000

BUSINESS ACQUISITIONS AND DIV37

BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Apr. 03, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Trade receivables, contractual amount		$ 35,073
Goodwill	$ 1,254,444		$ 804,906
MPI Research
Business Acquisition [Line Items]
Trade receivables		35,073
Inventories		4,463
Other current assets (excluding cash)		5,627
Property, plant and equipment		128,403
Goodwill		440,372
Definite-lived intangible assets		309,200
Other long-term assets		1,081
Deferred revenue		(22,600)
Current liabilities		(32,788)
Deferred tax liabilities		(66,379)
Other long-term liabilities		(2,213)
Total purchase price allocation		$ 800,239

BUSINESS ACQUISITIONS AND DIV38

BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Definite-Lived Intangible Assets (Details) - MPI Research $ in Thousands	Apr. 03, 2018USD ($)
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 DIV39

BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Pro Forma Information (Details) - MPI Research - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Business Acquisition [Line Items]
Revenue	$ 585,297	$ 504,710	$ 1,141,388	$ 1,031,198
Net income attributable to common shareholders	$ 60,161	$ 43,113	$ 109,575	$ 90,968
Earnings per common share
Basic (in dollars per share)	$ 1.25	$ 0.91	$ 2.28	$ 1.91
Diluted (in dollars per share)	$ 1.23	$ 0.89	$ 2.24	$ 1.88

BUSINESS ACQUISITIONS AND DIV40

BUSINESS ACQUISITIONS AND DIVESTITURE - KWS BioTest Limited Additional Information (Details) - KWS BioTest Limited $ in Thousands, £ in Millions	Jan. 11, 2018USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Jan. 11, 2018GBP (£)
Business Acquisition [Line Items]
Purchase price	$ 20,300
Undiscounted contingent payments	4,000			£ 3
Purchase price allocation	22,034
Cash acquired	$ 1,000
Integration related costs and transaction costs		$ 100	$ 500
Client relationships
Business Acquisition [Line Items]
Weighted average amortization life of intangible assets acquired			12 years

BUSINESS ACQUISITIONS AND DIV41

BUSINESS ACQUISITIONS AND DIVESTITURE - KWS BioTest Limited Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Apr. 03, 2018	Jan. 11, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Trade receivables, contractual amount		$ 35,073
Goodwill	$ 1,254,444			$ 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			18,165
Current liabilities			(1,575)
Deferred revenue			(151)
Other long-term liabilities			(596)
Total purchase price allocation			$ 22,034

BUSINESS ACQUISITIONS AND DIV42

BUSINESS ACQUISITIONS AND DIVESTITURE - Brains On-Line Additional Information (Details) - Aug. 04, 2017 - Brains On-Line $ in Thousands, € in Millions	USD ($)	EUR (€)	USD ($)
Business Acquisition [Line Items]
Purchase price	$ 21,300
Undiscounted contingent payments		€ 6.7	$ 7,800
Purchase price allocation			$ 20,122
Cash acquired	$ 600

BUSINESS ACQUISITIONS AND DIV43

BUSINESS ACQUISITIONS AND DIVESTITURE - Brains On-Line Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Apr. 03, 2018	Dec. 30, 2017	Aug. 04, 2017
Business Acquisition [Line Items]
Trade receivables, contractual amount		$ 35,073
Goodwill	$ 1,254,444		$ 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 DIV44

BUSINESS ACQUISITIONS AND DIVESTITURE - Brains On-Line Definite-Lived Intangible Assets (Details) - Brains On-Line $ in Thousands	Aug. 04, 2017USD ($)
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 DIV45

BUSINESS ACQUISITIONS AND DIVESTITURE - Contract Manufacturing, Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 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 DIV46

BUSINESS ACQUISITIONS AND DIVESTITURE - Contract Manufacturing, Schedule of Assets and Liabilities Disposed (Details) - USD ($) $ in Thousands	Jun. 30, 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 C47

REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenues by Major Business Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Disaggregation of Revenue [Line Items]
Total revenue	$ 585,301	$ 469,129	$ 1,079,271	$ 914,892
RMS
Disaggregation of Revenue [Line Items]
Total revenue	130,426	124,002	264,384	251,163
DSA
Disaggregation of Revenue [Line Items]
Total revenue	346,416	252,092	606,408	479,850
Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	108,459	$ 93,035	208,479	$ 183,879
Services and products transferred over time | RMS
Disaggregation of Revenue [Line Items]
Total revenue	48,804		97,530
Services and products transferred over time | DSA
Disaggregation of Revenue [Line Items]
Total revenue	346,226		605,970
Services and products transferred over time | Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	32,987		61,558
Services and products transferred at a point in time | RMS
Disaggregation of Revenue [Line Items]
Total revenue	81,622		166,854
Services and products transferred at a point in time | DSA
Disaggregation of Revenue [Line Items]
Total revenue	190		438
Services and products transferred at a point in time | Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	$ 75,472		$ 146,921

REVENUE FROM CONTRACTS WITH C48

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Estimated Revenue Related to Performance Obligations (Details) $ in Thousands	Jun. 30, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 116,998
Performance obligations expected to be satisfied, expected timing	6 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	$ 82,239
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	$ 2,623
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	$ 606
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	$ 202,466
DSA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	116,399
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	81,946
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	2,497
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	491
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	201,333
Manufacturing | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	599
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	293
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	126
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	115
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	$ 1,133

REVENUE FROM CONTRACTS WITH C49

REVENUE FROM CONTRACTS WITH CUSTOMERS - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 30, 2017
Revenue from Contract with Customer [Abstract]
Payment terms	30 days
Unpaid advanced client billings	$ 20,000
Contract liabilities (customer contract deposits)	37,543	$ 0
Revenue billed during period	79,000
Revenue recognized during period related to contract liabilities	$ 103,000

REVENUE FROM CONTRACTS WITH C50

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Client Receivables, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Client receivables	$ 372,360	$ 335,839
Contract assets (unbilled revenue)	108,580	96,297
Contract liabilities (current and long-term deferred revenue)	141,720
Contract liabilities (customer contract deposits)	$ 37,543	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

SEGMENT INFORMATION - Narrative (Details)	6 Months Ended
	Jun. 30, 2018segments
Segment Reporting [Abstract]
Number of reportable segments	3

SEGMENT INFORMATION - Revenue a

SEGMENT INFORMATION - Revenue and Other Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 585,301	$ 469,129	$ 1,079,271	$ 914,892
Operating income	76,710	81,686	144,539	151,392
Depreciation and amortization	43,396	31,799	76,606	64,210
Capital expenditures	21,213	15,997	48,939	31,917
RMS
Segment Reporting Information [Line Items]
Total revenue	130,426	124,002	264,384	251,163
Operating income	34,245	33,594	72,772	71,284
Depreciation and amortization	4,901	4,945	9,754	10,037
Capital expenditures	5,314	4,404	9,939	7,007
DSA
Segment Reporting Information [Line Items]
Total revenue	346,416	252,092	606,408	479,850
Operating income	56,623	51,335	97,482	89,670
Depreciation and amortization	31,042	18,965	51,829	38,334
Capital expenditures	10,894	7,102	23,696	15,425
Manufacturing
Segment Reporting Information [Line Items]
Total revenue	108,459	93,035	208,479	183,879
Operating income	34,115	29,043	62,638	55,643
Depreciation and amortization	5,868	5,787	11,604	11,749
Capital expenditures	$ 3,188	$ 1,939	$ 10,022	$ 4,231

SEGMENT INFORMATION - Reconcili

SEGMENT INFORMATION - Reconciliation of Segment Operating Income, Depreciation and Amortization, and Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting Information [Line Items]
Operating income	$ 76,710	$ 81,686	$ 144,539	$ 151,392
Depreciation and amortization	43,396	31,799	76,606	64,210
Capital expenditures	21,213	15,997	48,939	31,917
Total reportable segments
Segment Reporting Information [Line Items]
Operating income	124,983	113,972	232,892	216,597
Depreciation and amortization	41,811	29,697	73,187	60,120
Capital expenditures	19,396	13,445	43,657	26,663
Unallocated corporate
Segment Reporting Information [Line Items]
Operating income	(48,273)	(32,286)	(88,353)	(65,205)
Depreciation and amortization	1,585	2,102	3,419	4,090
Capital expenditures	$ 1,817	$ 2,552	$ 5,282	$ 5,254

SEGMENT INFORMATION - Revenue P

SEGMENT INFORMATION - Revenue Per Significant Product or Service (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 585,301	$ 469,129	$ 1,079,271	$ 914,892
RMS
Segment Reporting Information [Line Items]
Total revenue	130,426	124,002	264,384	251,163
DSA
Segment Reporting Information [Line Items]
Total revenue	346,416	252,092	606,408	479,850
Manufacturing
Segment Reporting Information [Line Items]
Total revenue	$ 108,459	$ 93,035	$ 208,479	$ 183,879

SEGMENT INFORMATION - Summary o

SEGMENT INFORMATION - Summary of Unallocated Corporate Overhead (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting Information [Line Items]
Stock-based compensation	$ 13,547	$ 11,890	$ 24,088	$ 21,376
Unallocated corporate
Segment Reporting Information [Line Items]
Stock-based compensation	9,616	7,421	16,607	13,004
Compensation, benefits, and other employee-related expenses	15,315	10,365	35,911	24,746
External consulting and other service expenses	5,010	4,085	7,944	9,852
Information technology	3,190	3,617	5,654	6,010
Depreciation	1,585	2,102	3,419	4,090
Acquisition and integration	11,692	1,191	14,556	1,212
Other general unallocated corporate	1,865	3,505	4,262	6,291
Total unallocated corporate expense	$ 48,273	$ 32,286	$ 88,353	$ 65,205

SEGMENT INFORMATION - Disaggreg

SEGMENT INFORMATION - Disaggregation of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 585,301	$ 469,129	$ 1,079,271	$ 914,892
U.S.
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	334,016	244,923	582,996	476,234
Europe
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	161,656	139,620	322,482	276,501
Canada
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	51,559	53,242	100,137	100,429
Asia Pacific
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	36,235	31,046	70,755	61,141
Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 1,835	$ 298	$ 2,901	$ 587

SUPPLEMENTAL BALANCE SHEET IN57

SUPPLEMENTAL BALANCE SHEET INFORMATION (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017	Jul. 01, 2017
Composition of trade receivables
Client receivables	$ 372,360	$ 335,839
Contract assets (unbilled revenue)	108,580	96,297
Total	480,940	432,136
Less: Allowance for doubtful accounts	(2,205)	(2,120)
Trade receivables, net	478,735	430,016
Composition of inventories
Raw materials and supplies	21,160	19,858
Work in process	20,084	18,200
Finished products	82,887	76,898
Inventories	124,131	114,956
Composition of other current assets
Investments	903	28,489
Prepaid income taxes	48,037	52,234
Restricted cash	593	592	$ 568
Other	300	0
Other current assets	49,833	81,315
Composition of other assets
Life insurance policies	34,919	34,008
Venture capital investments	91,323	71,101
Restricted cash	2,472	1,945	$ 1,986
Other	20,556	16,948
Other assets	149,270	124,002
Composition of other current liabilities
Accrued income taxes	26,915	43,250
Contract liabilities (customer contract deposits)	37,543	0
Other	9,145	1,210
Other current liabilities	73,603	44,460
Composition of other long-term liabilities
U.S. Transition Tax	61,038	61,038
Long-term pension liability	47,803	52,364
Accrued executive supplemental life insurance retirement plan and deferred compensation plan	38,215	37,582
Other	49,584	43,831
Other long-term liabilities	$ 196,640	$ 194,815

VENTURE CAPITAL INVESTMENTS - A

VENTURE CAPITAL INVESTMENTS - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Schedule of Equity Method Investments [Line Items]
Committed contribution	$ 109,100,000		$ 109,100,000
Venture capital investments	60,700,000		60,700,000
Dividends received	1,500,000	$ 0	8,500,000	$ 4,400,000
Gain (loss) from venture capital investments	$ 10,900,000	$ 2,500,000	$ 17,400,000	$ 6,700,000
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 - Additional Informa

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

FAIR VALUE - Fair Value of Asse

FAIR VALUE - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 532	$ 21
Other assets:
Life insurance policies	26,976	26,358
Total assets measured at fair value	27,508	26,379
Other current liabilities:
Contingent consideration	2,880	298
Total liabilities measured at fair value	2,880	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	532	21
Other assets:
Life insurance policies	26,976	26,358
Total assets measured at fair value	27,508	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	2,880	298
Total liabilities measured at fair value	$ 2,880	$ 298

FAIR VALUE - Contingent Conside

FAIR VALUE - Contingent Consideration (Details) - Contingent Consideration - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 298	$ 3,621
Additions	2,746	0
Payments	0	(406)
Foreign Currency Translation	(164)	0
Reversal of previously recorded contingent liability	0	(14)
Ending balance	$ 2,880	$ 3,201

GOODWILL AND INTANGIBLE ASSET62

GOODWILL AND INTANGIBLE ASSETS - Rollforward of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)
Changes in gross carrying amount and accumulated amortization of goodwill
December 30, 2017	$ 804,906
Acquisitions	458,903
Foreign Exchange	(9,365)
June 30, 2018	1,254,444
RMS
Changes in gross carrying amount and accumulated amortization of goodwill
December 30, 2017	58,122
Acquisitions	0
Foreign Exchange	(446)
June 30, 2018	57,676
DSA
Changes in gross carrying amount and accumulated amortization of goodwill
December 30, 2017	605,176
Acquisitions	458,903
Foreign Exchange	(6,565)
June 30, 2018	1,057,514
Manufacturing
Changes in gross carrying amount and accumulated amortization of goodwill
December 30, 2017	141,608
Acquisitions	0
Foreign Exchange	(2,354)
June 30, 2018	$ 139,254

GOODWILL AND INTANGIBLE ASSET63

GOODWILL AND INTANGIBLE ASSETS - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Other intangible assets
Gross	$ 949,473	$ 655,971
Accumulated Amortization	(300,337)	(286,209)
Net	649,136	369,762
Backlog
Other intangible assets
Gross	20,900	8,111
Accumulated Amortization	(6,092)	(8,111)
Net	14,808	0
Technology
Other intangible assets
Gross	103,361	81,309
Accumulated Amortization	(34,686)	(27,157)
Net	68,675	54,152
Trademarks and trade names
Other intangible assets
Gross	8,541	8,661
Accumulated Amortization	(4,579)	(4,562)
Net	3,962	4,099
Other
Other intangible assets
Gross	17,319	17,465
Accumulated Amortization	(8,905)	(7,845)
Net	8,414	9,620
Other intangible assets
Other intangible assets
Gross	150,121	115,546
Accumulated Amortization	(54,262)	(47,675)
Net	95,859	67,871
Client relationships
Other intangible assets
Gross	799,352	540,425
Accumulated Amortization	(246,075)	(238,534)
Net	$ 553,277	$ 301,891

LONG-TERM DEBT AND CAPITAL LE64

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Debt Instrument [Line Items]
Total debt	$ 1,815,055	$ 1,120,539
Less: Current portion of long-term debt	(28,230)	(28,546)
Long-term debt	1,786,825	1,091,993
Debt discount and debt issuance costs	(17,890)	(5,770)
Long-term debt, net	1,768,935	1,086,223
Term loans
Debt Instrument [Line Items]
Total debt	750,000	601,250
Revolving facility
Debt Instrument [Line Items]
Total debt	546,834	500,997
Senior Notes
Debt Instrument [Line Items]
Total debt	500,000	0
Other long-term debt
Debt Instrument [Line Items]
Total debt	$ 18,221	$ 18,292

LONG-TERM DEBT AND CAPITAL LE65

LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS - Additional Information (Details)	Apr. 03, 2018USD ($)	Mar. 26, 2018USD ($)payment	Jun. 30, 2018USD ($)	Feb. 12, 2018USD ($)	Dec. 30, 2017USD ($)
Debt Instrument [Line Items]
Weighted average interest rate			3.24%		2.45%
Number of consecutive fiscal quarters			1 year
Other Capital Lease Obligations
Debt Instrument [Line Items]
Other capital lease obligations			$ 30,600,000		$ 30,300,000
$2.3 Billion Credit Facility | Credit facility
Debt Instrument [Line Items]
Credit facility		$ 2,300,000,000
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
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
Term Loan | Credit facility
Debt Instrument [Line Items]
Credit facility		$ 750,000,000
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 INT66

EQUITY AND NONCONTROLLING INTEREST - Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Numerator:
Income from continuing operations, net of income taxes	$ 52,850	$ 54,673	$ 106,118	$ 101,636
Income (loss) from discontinued operations, net of income taxes	1,529	(71)	1,506	(75)
Less: Net income attributable to noncontrolling interests	670	650	1,284	831
Net income attributable to common shareholders	$ 53,709	$ 53,952	$ 106,340	$ 100,730
Denominator:
Weighted-average shares outstanding—Basic (in shares)	48,198	47,591	47,992	47,569
Effect of dilutive securities:
Stock options, restricted stock units, performance share units and restricted stock (in shares)	845	751	974	835
Weighted-average shares outstanding—Diluted (in shares)	49,043	48,342	48,966	48,404

EQUITY AND NONCONTROLLING INT67

EQUITY AND NONCONTROLLING INTEREST - Earnings Per Share, Additional Information (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 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	0.6	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)			1.1	1.1

EQUITY AND NONCONTROLLING INT68

EQUITY AND NONCONTROLLING INTEREST - Treasury Shares (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Treasury Shares
Purchase of treasury stock	$ 13,668,000	$ 70,820,000
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	$ 13,700,000	$ 16,300,000
Authorized Share Repurchase Program
Treasury Shares
Purchase of treasury stock	$ 0	$ 54,600,000
Stock repurchased during period (in shares)	0	600,000
Stock repurchase authorization	$ 1,300,000,000
Remaining authorized repurchase amount	$ 129,100,000

EQUITY AND NONCONTROLLING INT69

EQUITY AND NONCONTROLLING INTEREST - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Other comprehensive loss before reclassifications			$ (7,394)
Amounts reclassified from accumulated other comprehensive loss			1,249
Net current period other comprehensive (loss) income			(6,145)
Amount reclassified from accumulated other comprehensive loss due to adoption of ASU 2018-02 (See Note 1)			3,330
Income tax (benefit) expense	$ (2,320)	$ 397	(598)	$ 623
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			(7,394)
Amounts reclassified from accumulated other comprehensive loss			0
Net current period other comprehensive (loss) income			(7,394)
Amount reclassified from accumulated other comprehensive loss due to adoption of ASU 2018-02 (See Note 1)			0
Income tax (benefit) expense			(906)
June 30, 2018	(84,033)		(84,033)
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			1,249
Net current period other comprehensive (loss) income			1,249
Amount reclassified from accumulated other comprehensive loss due to adoption of ASU 2018-02 (See Note 1)			3,330
Income tax (benefit) expense			308
June 30, 2018	(69,575)		(69,575)
Total
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 30, 2017			(144,731)
June 30, 2018	$ (153,608)		$ (153,608)

EQUITY AND NONCONTROLLING INT70

EQUITY AND NONCONTROLLING INTEREST - Redeemable Noncontrolling Interest, Additional Information (Details) $ in Millions	Jun. 30, 2018USD ($)
Investment [Line Items]
Contractually defined redemption value	$ 17.1
Vital River
Investment [Line Items]
Noncontrolling interest ownership percentage	13.00%

EQUITY AND NONCONTROLLING INT71

EQUITY AND NONCONTROLLING INTEREST - Rollforward of Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance	$ 16,609	$ 14,659
Total gains or losses (realized/unrealized):
Foreign currency translation	(324)	367
Ending balance	16,662	15,317
Net income attributable to noncontrolling interest
Total gains or losses (realized/unrealized):
Net income attributable to noncontrolling interest	$ 377	$ 291

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Effective tax rate	24.80%	28.90%	20.40%	34.40%
Decrease in unrecognized tax benefits due to settlement of prior positions with tax authorities	$ 1.2
Decrease in unrecognized tax benefits	1.4
Unrecognized tax benefits	19.8		$ 19.8
Unrecognized tax benefits that would impact effective tax rate	18		18
Accrued interest and penalties on unrecognized tax benefits	2.7		2.7
Decrease in unrecognized tax benefits that are reasonably possibly over the next twelve-month period (up to)	$ 0.7		0.7
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

PENSION AND OTHER POST-RETIRE73

PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Pension
Employee benefits
Service cost	$ 969	$ 774	$ 1,815	$ 1,528
Interest cost	2,656	2,939	5,489	5,765
Expected return on plan assets	(4,012)	(3,485)	(7,889)	(6,935)
Amortization of prior service credit	(90)	(139)	(271)	(258)
Amortization of net loss	886	1,047	1,531	2,013
Net periodic cost	409	1,136	675	2,113
Other Postretirement Benefits Plan
Employee benefits
Net periodic cost	$ 0	$ 0	$ 0	$ 0

STOCK-BASED COMPENSATION - Stoc

STOCK-BASED COMPENSATION - Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Stock-based compensation expense
Stock-based compensation	$ 13,547	$ 11,890	$ 24,088	$ 21,376
Cost of revenue
Stock-based compensation expense
Stock-based compensation	1,738	1,743	3,151	3,289
Selling, general and administrative
Stock-based compensation expense
Stock-based compensation	$ 11,809	$ 10,147	$ 20,937	$ 18,087

STOCK-BASED COMPENSATION - Summ

STOCK-BASED COMPENSATION - Summary of Stock-Based Compensation Grants (Details) shares in Millions	6 Months Ended
	Jun. 30, 2018$ / sharesshares
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	$ 109.09
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

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Increase in lease obligations	$ 40.1

RESTRUCTURING AND ASSET IMPAI77

RESTRUCTURING AND ASSET IMPAIRMENT - Restructuring Costs by Classification on the Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Dec. 30, 2017	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	$ 1,856		$ 472	$ 2,494	$ 1,549
Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	174		225	759	1,208
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	1,682		247	1,735	341
Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	1,856		323	2,472	1,340
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	174		76	737	999
Severance and Transition Costs | Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	1,682		247	1,735	341
Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	0		149	22	209
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	0		149	22	209
Asset Impairments and Other Costs | Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	0		$ 0	0	$ 0
RMS
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	289	$ 18,100		1,327
RMS | Cost of services provided and products sold (excluding amortization of intangible assets)
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	271			1,139
RMS | Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	18			188
RMS | Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	220			743
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	202			555
RMS | Severance and Transition Costs | Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	18			188
RMS | Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Total severance and transition costs	69			584
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	69			584
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 IMPAI78

RESTRUCTURING AND ASSET IMPAIRMENT - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Dec. 30, 2017	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Mar. 31, 2018	Apr. 01, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1,856		$ 472	$ 2,494	$ 1,549
Severance and retention costs liability	6,810	$ 6,856	7,010	6,810	7,010	$ 7,053	$ 6,531	$ 8,102
Accrued Compensation
Restructuring Cost and Reserve [Line Items]
Severance and retention costs liability	2,600		2,500	2,600	2,500
RMS
Restructuring Cost and Reserve [Line Items]
Restructuring costs	289	18,100		1,327
RMS | Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs (not expected to exceed)	1,500			1,500
Cash portion of expected amount (up to)				3,000
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	1,856		323	2,472	1,340
Severance and Transition Costs | Other Noncurrent Liabilities
Restructuring Cost and Reserve [Line Items]
Severance and retention costs liability	4,200		$ 4,500	4,200	$ 4,500
Severance and Transition Costs | RMS
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 220			$ 743

RESTRUCTURING AND ASSET IMPAI79

RESTRUCTURING AND ASSET IMPAIRMENT - Schedule of Other Restructuring Initiatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1,856	$ 472	$ 2,494	$ 1,549
Cost of revenue
Restructuring Cost and Reserve [Line Items]
Restructuring costs	174	225	759	1,208
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,682	247	1,735	341
Severance and Transition Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,856	323	2,472	1,340
Severance and Transition Costs | Cost of revenue
Restructuring Cost and Reserve [Line Items]
Restructuring costs	174	76	737	999
Severance and Transition Costs | Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,682	247	1,735	341
Asset Impairments and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0	149	22	209
Asset Impairments and Other Costs | Cost of revenue
Restructuring Cost and Reserve [Line Items]
Restructuring costs	0	149	22	209
Asset Impairments and Other Costs | Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 0	$ 0	$ 0	$ 0

RESTRUCTURING AND ASSET IMPAI80

RESTRUCTURING AND ASSET IMPAIRMENT - Severance and Retention Costs by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Segment Reporting Information [Line Items]
Total severance and transition costs	$ 1,856	$ 472	$ 2,494	$ 1,549
DSA
Segment Reporting Information [Line Items]
Total severance and transition costs	1,197	225	965	481
Manufacturing
Segment Reporting Information [Line Items]
Total severance and transition costs	0	247	870	1,068
Unallocated corporate
Segment Reporting Information [Line Items]
Total severance and transition costs	$ 659	$ 0	$ 659	$ 0

RESTRUCTURING AND ASSET IMPAI81

RESTRUCTURING AND ASSET IMPAIRMENT - Rollforward of Severance and Transition Costs Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Restructuring Reserve [Roll Forward]
Beginning balance	$ 7,053	$ 6,531	$ 6,856	$ 8,102
Expense	2,076	323	3,215	1,340
Payments / utilization	(1,990)	(140)	(3,138)	(2,830)
Foreign currency adjustments	(329)	296	(123)	398
Ending balance	$ 6,810	$ 7,010	$ 6,810	$ 7,010