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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Components of the provision for income taxes
Federal	$ 0	$ 0
State	102	393
Deferred portion of income tax expense	(10,280)	(15,288)
Income Tax Expense	$ 10,382	$ 15,681
Effective Tax Rate	38.30%	37.30%

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The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable Income or Loss from continuing operations.

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