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Commitments and Contingencies (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Summary of the Bank's commitments and contingent liabilities
Commitments to extend credit
Commercial loans [Member]
Summary of the Bank's commitments and contingent liabilities
Commitments to extend credit	125,662	119,634
Consumer loans [Member]
Summary of the Bank's commitments and contingent liabilities
Commitments to extend credit	373,131	380,489
Real estate mortgage loans [Member]
Summary of the Bank's commitments and contingent liabilities
Commitments to extend credit	22,069	22,277
Real estate construction loans [Member]
Summary of the Bank's commitments and contingent liabilities
Commitments to extend credit	6,879	6,646
Standby letters of credit [Member]
Summary of the Bank's commitments and contingent liabilities
Commitments to extend credit	2,663	5,324
Deposit account overdraft privilege [Member]
Summary of the Bank's commitments and contingent liabilities
Commitments to extend credit	$ 67,947	$ 61,623

Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.

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