Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 41,802	$ 1,531	$ (19,305)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(925)	(767)	77
Changes in unrealized gains (losses) on available-for-sale securities	(15)	(16)	2
Other comprehensive income (loss), net of tax	(940)	(783)	79
Comprehensive income (loss)	$ 40,862	$ 748	$ (19,226)