SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Comprehensive Income (Details) $ in Thousands	3 Months Ended
	Mar. 26, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	$ (267,218)
Balance at the end of the period	(265,811)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(191,928)
Current-period comprehensive income (loss)	1,388
Balance at the end of the period	(190,540)
Unrealized Gain on Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	3,678
Current-period comprehensive income (loss)	19
Balance at the end of the period	3,697
Defined Benefit Pension Plan
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(78,968)
Current-period comprehensive income (loss)	0
Balance at the end of the period	(78,968)
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(267,218)
Current-period comprehensive income (loss)	1,407
Balance at the end of the period	$ (265,811)