STOCKHOLDERS' EQUITY - Schedule of Activity in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ 18,171	$ 20,830
Change in currency translation adjustment, net of tax	(1,882)	(2,659)	$ (148)
Balance at end of period	16,289	18,171	20,830
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	18,171	20,830	20,978
Reclassification to earnings, net of tax	0	0	(488)
Change in currency translation adjustment, net of tax		(2,659)	340
Balance at end of period	16,289	18,171	20,830
Unrealized investment gain
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	0	0	29
Reclassification to earnings, net of tax	0	0	(29)
Balance at end of period	$ 0	$ 0	$ 0