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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Client Receivables, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Client receivables	$ 590,594	$ 578,077
Unbilled revenue	221,793	228,020	$ 204,000
Total	812,387	806,097
Less: Allowance for credit losses	(25,407)	(25,722)
Trade receivables and contract assets, net	786,980	780,375
Current deferred revenue	256,383	241,820
Long-term deferred revenue (included in Other long-term liabilities)	32,448	30,919
Customer contract deposits (included in Other current liabilities)	$ 90,589	$ 85,554

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