REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

12 Months Ended

Dec. 30, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table disaggregates the Company’s revenue by major business line and timing of transfer of products or services:

Timing of Revenue Recognition:	2023		2022		2021
	(in thousands)
RMS
Services and products transferred over time	$	377,947	$	340,708	$	263,659
Services and products transferred at a point in time	414,396		398,467		426,778
Total RMS revenue	792,343		739,175		690,437
DSA
Services and products transferred over time	2,611,564		2,440,646		2,103,415
Services and products transferred at a point in time	4,059		6,670		3,816
Total DSA revenue	2,615,623		2,447,316		2,107,231
Manufacturing
Services and products transferred over time	381,942		371,500		335,745
Services and products transferred at a point in time	339,501		418,069		406,747
Total Manufacturing revenue	721,443		789,569		742,492
Total revenue	$	4,129,409	$	3,976,060	$	3,540,160

Revenue and long-lived assets by geographic area are as follows:

	U.S.		Europe		Canada		Asia Pacific		Other		Consolidated
	(in thousands)
2023
Revenue	$	2,347,486	$	1,076,937	$	487,305	$	200,833	$	16,848	$	4,129,409
Long-lived assets	964,176		407,375		157,483		74,605		36,102		1,639,741
2022
Revenue	$	2,342,158	$	1,032,125	$	398,982	$	192,837	$	9,958	$	3,976,060
Long-lived assets	896,235		349,361		135,300		82,778		1,981		1,465,655
2021
Revenue	$	1,934,404	$	1,036,465	$	339,098	$	222,902	$	7,291	$	3,540,160
Long-lived assets	755,400		323,405		145,274		64,864		2,125		1,291,068

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:

	December 30, 2023		December 31, 2022
	(in thousands)
Assets from contracts with customers
Client receivables	$	578,077	$	559,410
Unbilled revenue	228,020		204,258
Total	806,097		763,668
Less: Allowance for credit losses	(25,722)		(11,278)
Trade receivables and contract assets, net	$	780,375	$	752,390
Liabilities from contracts with customers
Current deferred revenue	$	241,820	$	264,259
Long term deferred revenue (included in Other long-term liabilities)	30,919		25,795
Customer contract deposits (included in Other current-liabilities)	85,554		91,640

The associated revenue is recognized on a straight-line basis over the term of the lease, which is generally less than one year.

	2023		2022		2021
	(in thousands)						Affected Line Item in the Consolidated Statements of Income
Lease revenue	$	93,103	$	60,118	$	18,118	Service revenue