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)	$ (14,966)	$ 8,249	$ (21,093)	$ 17,989
Other comprehensive income, net of tax
Foreign currency translation adjustment	1,507	702	246	961
Net decrease in unrealized loss on investments	80	21	248	199
Total other comprehensive income	1,587	723	494	1,160
Total comprehensive income (loss)	$ (13,379)	$ 8,972	$ (20,599)	$ 19,149