v2.4.0.6
Loans - Additional Information (Detail) (USD $)
6 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2011
Sep. 30, 2012
Dec. 30, 2011
Sep. 30, 2012
Troubled Debt Restructuring [Member]
Sep. 30, 2012
Troubled Debt Restructuring [Member]
Sep. 30, 2012
Troubled Debt Restructuring That Subsequently Defaults [Member]
Sep. 30, 2012
Troubled Debt Restructuring That Subsequently Defaults [Member]
Sep. 30, 2012
Loan Modification Reduction of Stated Interest Rate [Member]
Sep. 30, 2012
Loan Modification Extension of Maturity Date [Member]
Minimum [Member]
Sep. 30, 2012
Loan Modification Extension of Maturity Date [Member]
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]                    
Specific reserves to customers whose loan terms have been modified in troubled debt restructurings   $ 2,837,000 $ 2,074,000              
Post-Modification Outstanding Recorded Investment 17,129,911 153,891 15,229,000              
Loan term modifications in troubled debt restructurings, time period               3 years 8 months 12 months
Increased the allowance for loan losses due to troubled debt restructurings 1,699,000 1,189,000     2,871 0        
Charge offs due to troubled debt restructurings       0 1,112,147 477,091 1,739,238      
Period loan should be contractually past due under modified terms to be considered in payment default         30 days          
Loans individually analyzed for credit quality based on credit risk, individual outstanding balance   $ 100,000