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Deposits - Summary of Company's Deposits (Detail) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Banking And Thrift [Abstract]    
Non-interest bearing $ 58,109,595 $ 65,176,125
NOW 28,561,739 30,191,403
Savings 82,392,324 77,760,967
Money market 31,473,919 42,401,428
Time certificates, less than $100,000 137,021,897 160,610,601
Time certificates, $100,000 or more 103,563,142 121,142,374
Total interest bearing 383,013,021 432,106,773
Total deposits $ 441,122,616 $ 497,282,898