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Fair Value of Financial Instruments - Additional Information (Detail) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Property
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying value of an impaired loan $ 4,828,328 $ 682,517
Impaired loans, allowance for loan losses 728,176 176,932
Additional write downs on OREO previously acquired 200,983 216,000
Number of real estate properties acquired   10
Real Estate Investment Property, at Cost   553,243
Other real estate owned
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other real estate owned $ 1,432,658 $ 2,503,659