Unaudited Consolidated Statements of Comprehensive Income - 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)	$ 1,975	$ 14,272	$ (12,087)	$ 37,330
Other comprehensive income (loss):
Foreign currency translation adjustment	(366)	(67)	(531)	(38)
Comprehensive income (loss)	$ 1,609	$ 14,205	$ (12,618)	$ 37,292