Quarterly report pursuant to Section 13 or 15(d)

Loans - Troubled Debt Restructurings, Disaggregated by Type of Concession and by Loan Type (Detail)

v2.4.0.8
Loans - Troubled Debt Restructurings, Disaggregated by Type of Concession and by Loan Type (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal $ 5,329 $ 6,648
Non-Accrual TDRs, Deferral of Principal and Interest 2,796 3,288
Non-Accrual TDRs, Reduction of Principal and Interest 4,108 6,096
Non-Accrual TDRs, Extension of Maturity 1,134 2,737
Non-Accrual TDRs 13,367 18,769
Accrual TDRs, Deferral of Principal 4,337 6,788
Accrual TDRs Deferral of Principal and Interest    572
Accrual TDRs, Reduction of Principal and Interest 3,931 1,638
Accrual TDRs, Extension of Maturity 7,355 7,982
Accrual TDRs 15,623 16,980
Consumer loans [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal     
Non-Accrual TDRs, Deferral of Principal and Interest     
Non-Accrual TDRs, Reduction of Principal and Interest     
Non-Accrual TDRs, Extension of Maturity     
Non-Accrual TDRs     
Accrual TDRs, Deferral of Principal     
Accrual TDRs Deferral of Principal and Interest     
Accrual TDRs, Reduction of Principal and Interest 149  
Accrual TDRs, Extension of Maturity     
Accrual TDRs 149  
Real estate loans [Member] | Retail [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal      
Non-Accrual TDRs, Deferral of Principal and Interest      
Non-Accrual TDRs, Reduction of Principal and Interest      
Non-Accrual TDRs, Extension of Maturity    1,080
Non-Accrual TDRs    1,080
Accrual TDRs, Deferral of Principal 342 357
Accrual TDRs Deferral of Principal and Interest      
Accrual TDRs, Reduction of Principal and Interest      
Accrual TDRs, Extension of Maturity 174 175
Accrual TDRs 516 532
Real estate loans [Member] | Other [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal      
Non-Accrual TDRs, Deferral of Principal and Interest      
Non-Accrual TDRs, Reduction of Principal and Interest      
Non-Accrual TDRs, Extension of Maturity      
Non-Accrual TDRs      
Accrual TDRs, Deferral of Principal 523 527
Accrual TDRs Deferral of Principal and Interest      
Accrual TDRs, Reduction of Principal and Interest      
Accrual TDRs, Extension of Maturity      
Accrual TDRs 523 527
Real estate loans [Member] | Residential property [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 811 827
Non-Accrual TDRs, Deferral of Principal and Interest      
Non-Accrual TDRs, Reduction of Principal and Interest      
Non-Accrual TDRs, Extension of Maturity      
Non-Accrual TDRs 811 827
Accrual TDRs, Deferral of Principal      
Accrual TDRs Deferral of Principal and Interest    572
Accrual TDRs, Reduction of Principal and Interest      
Accrual TDRs, Extension of Maturity      
Accrual TDRs    572
Commercial and industrial loans [Member] | Unsecured [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal      
Non-Accrual TDRs, Deferral of Principal and Interest 570 658
Non-Accrual TDRs, Reduction of Principal and Interest 2,830 4,558
Non-Accrual TDRs, Extension of Maturity 926 1,413
Non-Accrual TDRs 4,326 6,629
Accrual TDRs, Deferral of Principal 906 976
Accrual TDRs Deferral of Principal and Interest      
Accrual TDRs, Reduction of Principal and Interest 1,848 1,090
Accrual TDRs, Extension of Maturity 2,671 3,260
Accrual TDRs 5,425 5,326
Commercial and industrial loans [Member] | Secured by real estate [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 2,221 2,317
Non-Accrual TDRs, Deferral of Principal and Interest 1,035 1,343
Non-Accrual TDRs, Reduction of Principal and Interest 279 318
Non-Accrual TDRs, Extension of Maturity      
Non-Accrual TDRs 3,535 3,978
Accrual TDRs, Deferral of Principal 2,116 4,444
Accrual TDRs Deferral of Principal and Interest      
Accrual TDRs, Reduction of Principal and Interest 579 448
Accrual TDRs, Extension of Maturity 4,510 4,547
Accrual TDRs 7,205 9,439
Commercial and industrial loans [Member] | Commercial lines of credit [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 656 673
Non-Accrual TDRs, Deferral of Principal and Interest      
Non-Accrual TDRs, Reduction of Principal and Interest 188 188
Non-Accrual TDRs, Extension of Maturity 208 244
Non-Accrual TDRs 1,052 1,105
Accrual TDRs, Deferral of Principal      
Accrual TDRs Deferral of Principal and Interest     
Accrual TDRs, Reduction of Principal and Interest      
Accrual TDRs, Extension of Maturity      
Accrual TDRs      
Commercial and industrial loans [Member] | SBA loans [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal 1,641 2,831
Non-Accrual TDRs, Deferral of Principal and Interest 1,191 1,287
Non-Accrual TDRs, Reduction of Principal and Interest 811 1,032
Non-Accrual TDRs, Extension of Maturity      
Non-Accrual TDRs 3,643 5,150
Accrual TDRs, Deferral of Principal 450 484
Accrual TDRs Deferral of Principal and Interest      
Accrual TDRs, Reduction of Principal and Interest 75 100
Accrual TDRs, Extension of Maturity      
Accrual TDRs 525 584
Commercial and industrial loans [Member] | International loans [Member]
   
Financing Receivable, Modifications [Line Items]    
Non-Accrual TDRs, Deferral of Principal     
Non-Accrual TDRs, Deferral of Principal and Interest     
Non-Accrual TDRs, Reduction of Principal and Interest     
Non-Accrual TDRs, Extension of Maturity     
Non-Accrual TDRs     
Accrual TDRs, Deferral of Principal     
Accrual TDRs Deferral of Principal and Interest     
Accrual TDRs, Reduction of Principal and Interest 1,280  
Accrual TDRs, Extension of Maturity     
Accrual TDRs $ 1,280