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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Components of the provision for income taxes
Federal	$ 0	$ 0
State	489	102
Deferred portion of income tax expense	38,374	10,280
Income tax expense	$ 38,863	$ 10,382
Effective tax rate	37.20%	38.30%

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.