Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (79,079)	$ 44,713	$ (151,710)
Foreign currency translation adjustments	6,029	(1,848)	(5,022)
Other comprehensive income (loss)	6,029	(1,848)	(5,022)
Comprehensive income (loss)	(73,050)	42,865	(156,732)
Less—Comprehensive loss attributable to noncontrolling interest	0	(106)	(1,013)
Comprehensive income (loss) attributable to the Company	$ (73,050)	$ 42,971	$ (155,719)