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Contractual Maturities of Investment Securities (Detail) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Available for Sale Amortized Cost      
Due within one year    $ 125,021  
Due over one to five years       1,032,792
Due over five to ten years    400,000 300,838
Due over ten years 32,729,025 38,353,076 36,466,967
Mortgage-backed, due in monthly installments 43,540,779 57,523,144 62,000,902
Available-for-sale Securities, Amortized Cost 76,269,804 96,401,241 99,801,499
Available for Sale Fair Value      
Due within one year    125,745   
Due over one to five years       1,046,248
Due over five to ten years    415,028 329,884
Due over ten years 31,233,063 40,881,179 37,986,215
Mortgage-backed, due in monthly installments 43,080,619 59,068,315 63,504,208
Available-for-sale Securities, Fair Value $ 74,313,682 $ 100,490,267 $ 102,866,555