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Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
Income Taxes (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Sep. 03, 2009	Dec. 31, 2008
Income Taxes
Income (loss) from continuing operations	$ 8,906,000	$ (18,042,000)	$ 9,492,000	$ (24,615,000)
Annual limitations on use of operating loss and tax credit carryforwards					$ 10,500,000	$ 85,000
Limitation period of recognition of built-in losses			5 years

Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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