SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Comprehensive Income (Loss) (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2019 USD ($)
Components of accumulated other comprehensive income (loss)
Beginning balance	$ 1,135,523
Ending balance	1,156,891
Foreign Currency Translation Adjustments
Components of accumulated other comprehensive income (loss)
Beginning balance	(230,261)
Current-period comprehensive income (loss)	(2,314)
Ending balance	(232,575)
Gain on Hedging Activities
Components of accumulated other comprehensive income (loss)
Beginning balance	11,171
Current-period comprehensive income (loss)	2,905
Ending balance	14,076
Defined Benefit Pension Plan
Components of accumulated other comprehensive income (loss)
Beginning balance	(84,095)
Current-period comprehensive income (loss)	(10,828)
Ending balance	(94,923)
Accumulated Other Comprehensive Income (Loss)
Components of accumulated other comprehensive income (loss)
Beginning balance	(303,185)
Current-period comprehensive income (loss)	(10,237)
Ending balance	$ (313,422)