GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Rollforward of Goodwill

The following table provides a rollforward of the changes in the carrying amount of the Company’s goodwill:

	RMS		DSA(1)		Manufacturing		Total
	(in thousands)
December 25, 2021	$	283,524	$	1,472,506	$	955,851	$	2,711,881
Acquisitions	215,752		—		(592)		215,160
Divestitures	—		—		(3,168)		(3,168)
Foreign exchange	(1,566)		(38,905)		(33,499)		(73,970)
December 31, 2022	497,710		1,433,601		918,592		2,849,903
Acquisitions	—		209,478		—		209,478
Divestitures	—		—		—		—
Foreign exchange	(236)		19,355		16,545		35,664
December 30, 2023	$	497,474	$	1,662,434	$	935,137	$	3,095,045
(1) DSA includes accumulated impairment losses of $1 billion, which were recognized in fiscal years 2008 and 2010.

Schedule of Finite-Lived Intangible Assets

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

	December 30, 2023						December 31, 2022
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
	(in thousands)
Client relationships	$	1,528,780	$	(721,322)	$	807,458	$	1,491,926	$	(591,417)	$	900,509
Technology	142,190		(111,764)		30,426		129,626		(101,655)		27,971
Backlog	$	3,100	$	(2,177)	$	923	$	15,236	$	(12,512)	$	2,724
Trademarks and trade names	11,878		(4,568)		7,310		12,617		(4,410)		8,207
Other	43,611		(25,677)		17,934		37,985		(22,121)		15,864
Intangible assets	$	1,729,559	$	(865,508)	$	864,051	$	1,687,390	$	(732,115)	$	955,275

Schedule of Estimated Amortization Expense

As of December 30, 2023, estimated amortization expense for intangible assets for each of the next five fiscal years is expected to be as follows:

Fiscal Year	Amortization Expense
	(in thousands)
2024	$	129,153
2025	$	120,995
2026	$	115,757
2027	$	103,164
2028	$	91,315