GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 25, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Rollforward of Goodwill

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

			Adjustments to Goodwill						Adjustments to Goodwill
	December 28, 2019		Acquisitions		Foreign Exchange		December 26, 2020		Acquisitions		Divestitures		Foreign Exchange		December 25, 2021
	(in thousands)
RMS	$	56,586	$	229,654	$	1,519	$	287,759	$	—	$	(4,129)	$	(106)	$	283,524
DSA	2,350,223		(629)		33,536		2,383,130		123,091		—		(28,715)		2,477,506
Manufacturing	138,756		—		4,523		143,279		851,828		(27,764)		(11,492)		955,851
Gross carrying amount	2,545,565		229,025		39,578		2,814,168		974,919		(31,893)		(40,313)		3,716,881
Accumulated impairment loss - DSA	(1,005,000)		—		—		(1,005,000)		—		—		—		(1,005,000)
Goodwill	$	1,540,565					$	1,809,168							$	2,711,881

Schedule of Intangible Assets, Net by Class

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

	December 25, 2021						December 26, 2020
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
	(in thousands)
Backlog	$	12,577	$	(9,517)	$	3,060	$	29,233	$	(29,233)	$	—
Technology	135,764		(95,454)		40,310		130,907		(81,305)		49,602
Trademarks and trade names	13,086		(3,448)		9,638		15,870		(5,648)		10,222
Other	35,231		(8,445)		26,786		20,903		(14,633)		6,270
Other intangible assets	196,658		(116,864)		79,794		196,913		(130,819)		66,094
Client relationships	1,475,757		(494,359)		981,398		1,137,331		(415,826)		721,505
Intangible assets	$	1,672,415	$	(611,223)	$	1,061,192	$	1,334,244	$	(546,645)	$	787,599

Schedule of Estimated Amortization Expense

As of December 25, 2021, 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)
2022	$	143,202
2023	131,385
2024	118,295
2025	110,830
2026	103,485