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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Components of the provision for income taxes
Federal	$ 0	$ 0	$ 0	$ 0
State	479	(46)	1,480	302
Deferred portion of income tax expense	124,269	42,380	198,180	98,619
Income tax expense	$ 124,748	$ 42,334	$ 199,660	$ 98,921
Effective tax rate	37.40%	37.50%	37.40%	37.60%

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.