Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ 24,467	$ (14,408)	$ 12,558	$ (21,157)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(3)	(15)	(2)	(9)
Comprehensive income (loss)	$ 24,464	$ (14,423)	$ 12,556	$ (21,166)