GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 27, 2021 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,005,245
Currency Translation	19,655
Goodwill, ending balance	1,024,900
U.S.
Goodwill [Roll Forward]
Goodwill, beginning balance	41,936
Currency Translation	0
Goodwill, ending balance	41,936
U.K. and Europe
Goodwill [Roll Forward]
Goodwill, beginning balance	835,505
Currency Translation	19,655
Goodwill, ending balance	855,160
Mexico
Goodwill [Roll Forward]
Goodwill, beginning balance	127,804
Currency Translation	0
Goodwill, ending balance	$ 127,804