Income Taxes Income Tax Expense (Benefit) Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%	35.00%
Tax at the statutory federal rate	$ 8,154	$ 947	$ 186,619	$ 81
State income taxes (net of federal benefit)	816	95	18,662	8
Decrease in valuation allowance	(864)	(907)	(90,164)	(100)
Other	584	(135)	477	11
Income tax expense	$ 8,690	$ 0	$ 115,594	$ 0

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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The sum of current income tax expense or benefit and deferred income tax expense or benefit pertaining to continuing operations, tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items, and tax effect of gains and losses from events or transactions meeting the criteria to be classified as an extraordinary item.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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