Quarterly report pursuant to Section 13 or 15(d)

Loans - Information on Impaired Loans, Disaggregated by Loan Class (Detail)

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Loans - Information on Impaired Loans, Disaggregated by Loan Class (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Financing Receivable, Impaired [Line Items]          
Recorded Investment $ 49,382   $ 49,382   $ 53,066
Unpaid Principal Balance 53,069   53,069   56,563
With No Related Allowance Recorded 38,177   38,177   33,292
With an Allowance Recorded 11,205   11,205   19,774
Related Allowance 5,784   5,784   6,468
Average Recorded Investment 49,827 43,767 49,632 46,622  
Interest Income Recognized 796 900 2,353 2,722  
Real estate loans [Member] | Retail [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 4,443   4,443   6,244
Unpaid Principal Balance 4,543   4,543   6,332
With No Related Allowance Recorded 1,940   1,940   3,767
With an Allowance Recorded 2,503   2,503   2,477
Related Allowance 256   256   305
Average Recorded Investment 4,456 2,723 5,682 3,703  
Interest Income Recognized 36 27 215 105  
Real estate loans [Member] | Hotel/Motel [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 4,042   4,042   6,200
Unpaid Principal Balance 4,855   4,855   6,940
With No Related Allowance Recorded 4,042   4,042   4,668
With an Allowance Recorded         1,532
Related Allowance 1,261   1,261   1,183
Average Recorded Investment 4,206 6,377 4,149 4,752  
Interest Income Recognized 102 127 232 384  
Real estate loans [Member] | Gas station [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 14,152   14,152   9,389
Unpaid Principal Balance 14,681   14,681   9,884
With No Related Allowance Recorded 13,692   13,692   8,592
With an Allowance Recorded 460   460   797
Related Allowance 166   166   209
Average Recorded Investment 14,181 8,777 12,023 8,775  
Interest Income Recognized 218 229 587 569  
Real estate loans [Member] | Other [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 9,856   9,856   11,451
Unpaid Principal Balance 11,266   11,266   12,882
With No Related Allowance Recorded 8,518   8,518   9,555
With an Allowance Recorded 1,338   1,338   1,896
Related Allowance 344   344   351
Average Recorded Investment 9,898 8,699 10,716 9,512  
Interest Income Recognized 232 243 682 779  
Real estate loans [Member] | Residential property [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 3,161   3,161   2,678
Unpaid Principal Balance 3,292   3,292   2,773
With No Related Allowance Recorded 3,161   3,161   2,678
Average Recorded Investment 3,173 2,992 2,853 3,026  
Interest Income Recognized 30 33 87 92  
Commercial and industrial loans [Member] | Commercial term [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 7,958   7,958   13,834
Unpaid Principal Balance 8,408   8,408   14,308
With No Related Allowance Recorded 1,914   1,914   2,929
With an Allowance Recorded 6,044   6,044   10,905
Related Allowance 3,469   3,469   3,806
Average Recorded Investment 8,118 10,581 10,007 12,751  
Interest Income Recognized 126 191 443 692  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 2,874   2,874   614
Unpaid Principal Balance 2,976   2,976   686
With No Related Allowance Recorded 2,692   2,692   173
With an Allowance Recorded 182   182   441
Related Allowance 183   183   252
Average Recorded Investment 2,884 840 1,447 1,137  
Interest Income Recognized 36 23 61 47  
Commercial and industrial loans [Member] | International loans [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 1,138   1,138   1,087
Unpaid Principal Balance 1,138   1,138   1,087
With No Related Allowance Recorded 460   460   286
With an Allowance Recorded 678   678   801
Related Allowance 105   105   78
Average Recorded Investment 1,146 1,197 1,136 1,342  
Consumer loans [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 1,758   1,758   1,569
Unpaid Principal Balance 1,910   1,910   1,671
With No Related Allowance Recorded 1,758   1,758   644
With an Allowance Recorded         925
Related Allowance         284
Average Recorded Investment 1,765 1,581 1,619 1,624  
Interest Income Recognized $ 16 $ 27 $ 46 $ 54