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Employee Stock Ownership Plan (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Employee Stock Ownership Plan Details    
Allocated shares 453,091 435,399
Committed-to-be-released shares 10,000 10,417
Unreleased shares 126,666 147,083
Total shares held by the ESOP 589,757 592,899
Fair value of unreleased shares $ 3,191,983 $ 3,428,505