REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

12 Months Ended

Dec. 25, 2021

Revenue from Contract with Customer [Abstract]

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:	2021		2020		2019
	(in thousands)
RMS
Services and products transferred over time	$	263,659	$	240,480	$	227,872
Services and products transferred at a point in time	426,778		330,672		309,217
Total RMS revenue	690,437		571,152		537,089
DSA
Services and products transferred over time	2,103,415		1,836,519		1,618,281
Services and products transferred at a point in time	3,816		909		714
Total DSA revenue	2,107,231		1,837,428		1,618,995
Manufacturing
Services and products transferred over time	335,745		174,254		142,896
Services and products transferred at a point in time	406,747		341,099		322,246
Total Manufacturing revenue	742,492		515,353		465,142
Total revenue	$	3,540,160	$	2,923,933	$	2,621,226

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

	2021		2020		2019
	(in thousands)
RMS	$	690,437	$	571,152	$	537,089
DSA	2,107,231		1,837,428		1,618,995
Manufacturing	742,492		515,353		465,142
Total revenue	$	3,540,160	$	2,923,933	$	2,621,226

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 December 25, 2021:

	Revenue Expected to be Recognized in Future Periods
	Less than 1 Year		1 to 3 Years		4 to 5 Years		Beyond 5 Years		Total
	(in thousands)
DSA	$	355,127	$	338,685	$	18,250	$	1,683	$	713,745
Manufacturing	2,728		—		—		—		$	2,728
Total	$	357,855	$	338,685	$	18,250	$	1,683	$	716,473

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 25, 2021		December 26, 2020
	(in thousands)
Balances from contracts with customers:
Client receivables	$	489,452	$	489,042
Contract assets (unbilled revenue)	160,609		135,400
Contract liabilities (current and long-term deferred revenue)	240,281		227,417
Contract liabilities (customer contract deposits)	59,512		42,244