SHAREHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
December 31, 2016	$ 38,885
Current-period change	1,648
June 30, 2017	40,811
Accumulated Other Comprehensive Income, Net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
December 31, 2016	1,834
June 30, 2017	3,482
Foreign Currency Translation and Remeasurement
AOCI Attributable to Parent, Net of Tax [Roll Forward]
December 31, 2016	1,534
Current-period change	1,648
June 30, 2017	3,182
Pension Postretirement Benefit Obligation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
December 31, 2016	300
Current-period change	0
June 30, 2017	$ 300