Quarterly report pursuant to Section 13 or 15(d)

Non-Accrual Loans, Disaggregated by Class of Loans (Detail)

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Non-Accrual Loans, Disaggregated by Class of Loans (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans $ 44,692 $ 52,378
Real Estate Loan [Member] | Retail [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 1,102 1,260
Real Estate Loan [Member] | Land [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 2,037 2,362
Real Estate Loan [Member] | Other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans   1,199
Real Estate Loan [Member] | Construction [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 7,868 8,310
Real Estate Loan [Member] | Residential Property [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 1,411 2,097
Commercial and Industrial Loans [Member] | Unsecured [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 8,106 7,706
Commercial and Industrial Loans [Member] | Secured by Real Estate [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 8,418 11,725
Commercial and Industrial Loans [Member] | Commercial Lines of Credit [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 1,359 1,431
Commercial and Industrial Loans [Member] | SBA Loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 13,048 15,479
Consumer Loans [Member] | Consumer Loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans $ 1,343 $ 809