Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 154,455	$ (242,267)
Foreign currency translation adjustment	1,373	9,058
Other comprehensive income	1,373	9,058
Comprehensive income (loss)	$ 155,828	$ (233,209)