CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (5,336)	$ 2,384	$ 6,056	$ (9,001)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	676	(6,500)	(5,936)	(6,958)
Unrealized change in available-for-sale and non-marketable securities (net of $0 tax for the three and nine months ended September 30, 2015, respectively; net of tax of $(25) and $230 for the three and nine months ended September 30, 2014, respectively)	(446)	(195)	(185)	226
Unrealized change in cash flow hedges (net of $0 tax for each of the three and nine months ended September 30, 2015; net of tax of $154 for each of the three and nine months ended September 30, 2014)	(582)	1,328	(1,197)	1,806
Net change in other comprehensive loss, net of tax	(352)	(5,367)	(7,318)	(4,926)
Comprehensive loss	$ (5,688)	$ (2,983)	$ (1,262)	$ (13,927)