Condensed Consolidated Statements of Comprehensive Operations (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (55,200)	$ 129,980	$ 3,110	$ 217,551
Other comprehensive income, net of income tax:
Interest rate lock derivative contracts reclassified to income, net of tax of $11, $11, $24 and $19, respectively	17	17	32	37
Total other comprehensive income	17	17	32	37
Comprehensive income (loss)	$ (55,183)	$ 129,997	$ 3,142	$ 217,588