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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Taxes
Income tax expense recognized on pre-tax earnings	$ 2,856	$ 3,066	$ 4,384	$ 5,545
Pre-tax earnings	$ 7,096	$ 7,694	$ 10,892	$ 14,038
Income taxes
Effective tax rate (as a percent)				39.50%
Projected
Income taxes
Effective tax rate (as a percent)			40.20%

- 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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