Annual report pursuant to Section 13 and 15(d)

Loans - Troubled Debt Restructurings that Defaulted Subsequent to Modifications Occurring Within Previous Twelve Months, Disaggregated by Loan Class (Detail)

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Loans - Troubled Debt Restructurings that Defaulted Subsequent to Modifications Occurring Within Previous Twelve Months, Disaggregated by Loan Class (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
SecurityLoan
Dec. 31, 2012
SecurityLoan
Dec. 31, 2011
SecurityLoan
Financing Receivable, Modifications [Line Items]      
Number of Loans 4 12 14
Recorded Investment $ 338 $ 907 $ 3,818
Commercial and Industrial loans [Member] | Unsecured [Member]
     
Financing Receivable, Modifications [Line Items]      
Number of Loans 2 8 6
Recorded Investment 123 554 2,368
Commercial and Industrial loans [Member] | Secured by real estate [Member]
     
Financing Receivable, Modifications [Line Items]      
Number of Loans       
Recorded Investment         
Commercial and Industrial loans [Member] | Commercial lines of credit [Member]
     
Financing Receivable, Modifications [Line Items]      
Number of Loans    1  
Recorded Investment    188   
Commercial and Industrial loans [Member] | SBA loans [Member]
     
Financing Receivable, Modifications [Line Items]      
Number of Loans 2 3 8
Recorded Investment $ 215 $ 165 $ 1,450