Quarterly report pursuant to Section 13 or 15(d)

Loans - Troubled Debt Restructuring, Disaggregated by Loan Class (Detail)

v2.4.0.6
Loans - Troubled Debt Restructuring, Disaggregated by Loan Class (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
SecurityLoan
Mar. 31, 2012
SecurityLoan
Financing Receivable, Modifications [Line Items]    
Number of Loans 4 31
Pre-Modification Outstanding Recorded Investment $ 1,789 $ 6,511
Post-Modification Outstanding Recorded Investment 1,635 6,399
Real Estate Loans [Member] | Retail [Member]
    
Financing Receivable, Modifications [Line Items]    
Number of Loans   1
Pre-Modification Outstanding Recorded Investment   102
Post-Modification Outstanding Recorded Investment   102
Real Estate Loans [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Number of Loans   2
Pre-Modification Outstanding Recorded Investment   509
Post-Modification Outstanding Recorded Investment   504
Commercial and Industrial Loans [Member] | Unsecured [Member]
    
Financing Receivable, Modifications [Line Items]    
Number of Loans 1 20
Pre-Modification Outstanding Recorded Investment 197 3,615
Post-Modification Outstanding Recorded Investment 198 3,537
Commercial and Industrial Loans [Member] | Secured By Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Number of Loans   2
Pre-Modification Outstanding Recorded Investment   1,813
Post-Modification Outstanding Recorded Investment   1,801
Commercial and Industrial Loans [Member] | SBA Loans [Member]
    
Financing Receivable, Modifications [Line Items]    
Number of Loans 1 6
Pre-Modification Outstanding Recorded Investment 8 472
Post-Modification Outstanding Recorded Investment 7 455
Commercial and Industrial Loans [Member] | International Loans [Member]
    
Financing Receivable, Modifications [Line Items]    
Number of Loans 2   
Pre-Modification Outstanding Recorded Investment 1,584   
Post-Modification Outstanding Recorded Investment $ 1,430