GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill (Details) $ in Thousands	3 Months Ended
	Apr. 01, 2018 USD ($)
Goodwill [Roll Forward]
Balance, beginning of period	$ 1,001,889
Currency Translation	31,237
Balance, end of period	1,033,126
U.S.
Goodwill [Roll Forward]
Balance, beginning of period	41,936
Currency Translation	0
Balance, end of period	41,936
U.K. and Europe
Goodwill [Roll Forward]
Balance, beginning of period	834,346
Currency Translation	31,237
Balance, end of period	865,583
Mexico
Goodwill [Roll Forward]
Balance, beginning of period	125,607
Currency Translation	0
Balance, end of period	$ 125,607