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REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Percentage of unbilled revenue billed during period	70.00%	70.00%
Unbilled revenue	$ 221,793		$ 228,020	$ 204,000
Percentage of contract liabilities recognized as revenue during period	60.00%	65.00%
Contract liabilities			273,000	$ 290,000
Unpaid advanced client billings	$ 52,000		$ 41,000
Provision for credit losses	839	$ 3,238
Performance obligations expected to be satisfied	$ 920,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-03-31
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage	50.00%
Performance obligations expected to be satisfied, expected timing	12 months

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