Condensed Consolidated Statements of Comprehensive Operations (Unaudited) - 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)	$ (2,244,126)	$ 268,748	$ (3,500,371)	$ 271,858
Other comprehensive income, net of income tax:
Interest rate lock derivative contracts reclassified to income, net of tax of $11, $11, $32, and $35, respectively	17	18	52	50
Total other comprehensive income	17	18	52	50
Comprehensive income (loss)	$ (2,244,109)	$ 268,766	$ (3,500,319)	$ 271,908