ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of Changes in Accumulated Other Comprehensive Loss Included Within Shareholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 214,603
Other comprehensive income (loss)	$ 657	$ 3,301	874	$ (6,175)
Tax Provision	(257)	319	(155)	134
Other comprehensive income (loss), net of tax			719	(6,041)
Balance, end of period	167,905		167,905
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(27,678)	(30,190)
Balance, end of period	(26,959)	(36,231)	(26,959)	(36,231)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(23,045)	(26,742)
Other comprehensive income (loss)			874	(6,158)
Tax Provision			(155)	129
Balance, end of period	(22,171)	(32,900)	(22,171)	(32,900)
Foreign Currency Hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			2,988	4,186
Other comprehensive income (loss)			0	(17)
Tax Provision			0	5
Balance, end of period	2,988	4,169	2,988	4,169
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(8,021)	(8,021)
Other comprehensive income (loss)			0	0
Balance, end of period	(8,021)	(8,021)	(8,021)	(8,021)
Tax Provision
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			400	387
Tax Provision			(155)	134
Balance, end of period	$ 245	$ 521	$ 245	$ 521