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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Taxes
Income tax expense recognized on pre-tax earnings	$ 2,623	$ 3,760	$ 7,007	$ 9,305
Pre-tax earnings	$ 5,077	$ 9,825	$ 15,969	$ 23,863
Income taxes
Effective tax rate (as a percent)				39.00%
Projected
Income taxes
Effective tax rate (as a percent)			43.90%

- Definition

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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- Definition

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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