SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Comprehensive Income (Details) $ in Thousands	3 Months Ended
	Mar. 27, 2021 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	$ 1,182,062
Balance, ending	1,224,814
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(213,064)
Current-period comprehensive income (loss)	(12,160)
Balance, ending	(225,224)
Gain on Hedging Activities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	15,550
Current-period comprehensive income (loss)	13,558
Balance, ending	29,108
Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(112,272)
Current-period comprehensive income (loss)	832
Balance, ending	(111,440)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	(309,786)
Current-period comprehensive income (loss)	2,230
Balance, ending	$ (307,556)