CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (96,378)	$ (127,110)	$ 63,269
Other comprehensive income (loss):
Foreign currency translation adjustment	0	0	607
Other comprehensive income (loss)	0	0	607
Comprehensive income (loss)	$ (96,378)	$ (127,110)	$ 63,876