Quarterly report pursuant to Section 13 or 15(d)

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

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Loans - Non-Accrual Loans, Disaggregated by Loan Class (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans $ 22,776 $ 37,279
Real estate loans [Member] | Retail [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 768 1,079
Real estate loans [Member] | Land [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans   2,097
Real estate loans [Member] | Residential property [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 1,659 1,270
Commercial and Industrial loans [Member] | Unsecured [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 2,490 8,311
Commercial and Industrial loans [Member] | Secured by real estate [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 5,591 8,679
Commercial and Industrial loans [Member] | Commercial lines of credit [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 830 1,521
Commercial and Industrial loans [Member] | SBA loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans 9,959 12,563
Consumer Loans [Member] | Consumer loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total non-accrual loans $ 1,479 $ 1,759