CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 7,006	$ (911)	$ 11,392	$ (11,385)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	1,510	(609)	(6,612)	(458)
Unrealized change in available-for-sale and non-marketable securities (net of $0 tax for the three and six months ended June 30, 2015, respectively; net of tax of $(545) and $256 for the three and six months ended June 30, 2014, respectively)	37	(898)	261	421
Unrealized change in cash flow hedges (net of $0 tax for the three and six months ended June 30, 2015 and 2014)	(2,403)	181	(615)	478
Net change in other comprehensive income (loss), net of tax	(856)	(1,326)	(6,966)	441
Comprehensive income (loss)	$ 6,150	$ (2,237)	$ 4,426	$ (10,944)