ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of Changes in Accumulated Other Comprehensive Loss Included Within Shareholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 436,670
Other comprehensive income (loss)	(9,476)	$ 2,088
Tax Provision	(185)	(69)
Other comprehensive income (loss), net of tax	(9,661)	2,019
Balance, end of period	227,429
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(30,190)	(34,392)
Balance, end of period	(39,851)	(32,373)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(26,742)	(30,607)
Other comprehensive income (loss)	(9,741)	1,809
Tax Provision	(120)	0
Balance, end of period	(36,483)	(28,798)
Foreign Currency Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	4,186	3,904
Other comprehensive income (loss)	265	279
Tax Provision	(65)	(69)
Balance, end of period	4,451	4,183
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(8,021)	(7,859)
Other comprehensive income (loss)	0	0
Balance, end of period	(8,021)	(7,859)
Tax Provision
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	387	170
Tax Provision	(185)	(69)
Balance, end of period	$ 202	$ 101