ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Summary of Changes by Component (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 01, 2018	Sep. 30, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ (43,774)	$ (43,774)
Other comprehensive income before reclassifications		(6,447)
Amounts reclassified from accumulated other comprehensive loss		4,026
Net of tax		(2,421)
Ending Balance		(52,445)
Unrealized gains (losses) on Interest Rate Swaps
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	0	0
Other comprehensive income before reclassifications		1,964
Amounts reclassified from accumulated other comprehensive loss		0
Net of tax		1,964
Ending Balance		1,964
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(5,487)	(5,487)
Other comprehensive income before reclassifications		(13,447)
Amounts reclassified from accumulated other comprehensive loss		0
Net of tax		(13,447)
Ending Balance		(18,934)
Pension and Other Post-Employment Liability Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(38,287)	(38,287)
Other comprehensive income before reclassifications		5,036
Amounts reclassified from accumulated other comprehensive loss		4,026
Net of tax		9,062
Ending Balance		$ (35,475)
ASU 2018-02
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Adoption of ASU 2018-02	$ (6,250)