v2.4.0.6
Loans by Class Modified as Troubled Debt Restructurings for which there was Payment Default within Twelve Months following Modification (Detail) (USD $)
Jun. 30, 2012
Loan
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] 
Number of Loans12
Recorded Investment$ 15,951,335
Commercial
 
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] 
Number of Loans3
Recorded Investment467,796
Residential real estate | Residential Real Estate Other Financing Receivable
 
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] 
Number of Loans3
Recorded Investment3,195,080
Nonresidential real estate | Commercial Mortgage Loans, Owner Occupied
 
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] 
Number of Loans1
Recorded Investment7,647,784
Nonresidential real estate | Commercial Mortgage Loans, Non Owner Occupied
 
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] 
Number of Loans3
Recorded Investment1,472,171
Construction
 
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] 
Number of Loans2
Recorded Investment3,168,504
Municipal Obligations
 
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] 
Number of Loans0
Recorded Investment$ 0