STOCKHOLDERS' EQUITY - Schedule of Activity in Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ 20,830	$ 21,007
Change in currency translation adjustment, net of tax	(2,659)	(148)	512
Changes in unrealized investment gain, net of tax	0	(29)	23
Balance at end of period	18,171	20,830	21,007
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	20,830	20,978	20,466
Reclassification to earnings, net of tax	0	(488)	0
Change in currency translation adjustment, net of tax		340	512
Balance at end of period	18,171	20,830	20,978
Unrealized investment gain
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	0	29	6
Reclassification to earnings, net of tax	0	(29)	(6)
Changes in unrealized investment gain, net of tax	0	0	29
Balance at end of period	$ 0	$ 0	$ 29