CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) [Abstract]
Net income (loss)	$ 4,730	$ 2,338	$ 11,331	$ (9,398)
Unrealized gain on foreign currency exchange contracts	220	(685)	1,142	(329)
Unrealized gain (loss) on available-for-sale securities	55	(2)	(267)	265
Comprehensive income (loss)	$ 5,005	$ 1,651	$ 12,206	$ (9,462)