REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

12 Months Ended

Dec. 28, 2019

Revenue from Contract with Customer [Abstract]

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



Major Products/Service Lines:	2019		2018
	(in thousands)
RMS	$	537,089	$	519,682
DSA	1,618,995		1,316,854
Manufacturing	465,142		429,560
Total revenue	$	2,621,226	$	2,266,096



Timing of Revenue Recognition:	2019		2018
	(in thousands)
RMS
Services and products transferred over time	$	227,872	$	202,872
Services and products transferred at a point in time	309,217		316,810
DSA
Services and products transferred over time	1,618,281		1,316,005
Services and products transferred at a point in time	714		849
Manufacturing
Services and products transferred over time	142,896		128,287
Services and products transferred at a point in time	322,246		301,273
Total revenue	$	2,621,226	$	2,266,096

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



	2019		2018		2017
	(in thousands)
RMS	$	537,089	$	519,682	$	493,615
DSA	1,618,995		1,316,854		980,022
Manufacturing	465,142		429,560		383,964
Total revenue	$	2,621,226	$	2,266,096	$	1,857,601

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 28, 2019:



	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	$	156,125	$	89,458	$	5,965	$	527	$	252,075
Manufacturing	11,604		11,816		19		13		23,452
Total	$	167,729	$	101,274	$	5,984	$	540	$	275,527

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 28, 2019		December 29, 2018
	(in thousands)
Balances from contracts with customers:
Client receivables	$	395,740	$	370,131
Contract assets (unbilled revenue)	121,957		105,216
Contract liabilities (current and long-term deferred revenue)	192,788		179,559
Contract liabilities (customer contract deposits)	33,080		38,245