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Federal Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of the statutory federal income tax rate to the effective tax rate:
Income tax at statutory rates	$ 4,655	$ 3,878	$ 3,183
Increase (decrease) resulting from:
Tax exempt interest	(677)	(689)	(744)
Change in prior estimates and other	(74)	(296)	(57)
Total	$ 3,904	$ 2,893	$ 2,382

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to pretax Income or Loss from continuing operations; income tax expense or benefit may include interest and penalties on tax uncertainties based on the entity's accounting policy.

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