REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Client Receivables, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Dec. 30, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
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
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