SHAREHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
March 31, 2019	$ 27,275
March 31, 2020	28,335
Accumulated Other Comprehensive Income, Net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
March 31, 2019	3,757
Current-period change	(1,634)
March 31, 2020	2,123
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
March 31, 2019	3,435
Current-period change	(1,634)
March 31, 2020	1,801
Pension Postretirement Benefit Obligation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
March 31, 2019	322
Current-period change	0
March 31, 2020	$ 322