GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 01, 2023	Dec. 31, 2022
Other intangible assets
Gross	$ 1,742,140	$ 1,687,390
Accumulated Amortization	(812,250)	(732,115)
Net	929,890	955,275
Client relationships
Other intangible assets
Gross	1,534,069	1,491,926
Accumulated Amortization	(659,955)	(591,417)
Net	874,114	900,509
Technology
Other intangible assets
Gross	141,716	129,626
Accumulated Amortization	(107,312)	(101,655)
Net	34,404	27,971
Backlog
Other intangible assets
Gross	15,441	15,236
Accumulated Amortization	(13,903)	(12,512)
Net	1,538	2,724
Trademarks and trade names
Other intangible assets
Gross	12,835	12,617
Accumulated Amortization	(5,021)	(4,410)
Net	7,814	8,207
Other
Other intangible assets
Gross	38,079	37,985
Accumulated Amortization	(26,059)	(22,121)
Net	$ 12,020	$ 15,864