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Income Taxes (Schedule of Federal and State Income Tax Provision) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
Federal, current	$ 34,941	$ 11,371	$ 11,675
State, current	6,635	3,926	2,814
Current	41,576	15,297	14,489
Deferred
Federal, deferred	(327)	7,948	1,112
State, deferred	231	256	293
Deferred	$ (96)	$ 8,204	$ 1,405

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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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