CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) [Abstract]
Net income (loss)	$ 13,214	$ (4,185)	$ 6,602	$ (11,736)
Unrealized gain on foreign currency exchange contracts, net of income tax provision of $0, ($69), $0 and $0	1,814	229	922	357
Unrealized gain (loss) on available-for-sale securities, net of income tax benefit of $0, $62, $0 and $0	(252)	153	(322)	267
Comprehensive income (loss)	$ 14,776	$ (3,803)	$ 7,202	$ (11,112)