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Deposits - Summary of Company's Deposits (Detail) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Banking And Thrift [Abstract]    
Non-interest bearing $ 63,869,164 $ 65,176,125
Interest bearing    
NOW 33,705,921 30,191,403
Savings 94,601,276 77,760,967
Money market 36,494,053 42,401,428
Time certificates, less than $100,000 136,324,642 160,610,601
Time certificates, $100,000 or more 112,647,818 121,142,374
Total interest bearing 413,773,710 432,106,773
Total deposits $ 477,642,874 $ 497,282,898