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Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Income Taxes (Textual) [Abstract]
Unrecognized tax benefits	$ 3,400,000		$ 3,400,000		$ 300,000
Expected change in unrecognized tax benefit	2,100,000		2,100,000
Income taxes at estimated effective tax rates	25.30%	52.10%	25.60%	43.60%
Net tax Expense (Benefit)	$ (686,000)	$ 3,570,000	$ 4,044,000	$ 8,641,000
Federal statutory rate	35.00%	35.00%	35.00%	35.00%

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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