Quarterly report pursuant to Section 13 or 15(d)

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

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Loans and Leases - Information on Impaired Loans, Disaggregated by Loan Class (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]          
Recorded Investment $ 27,499   $ 27,499   $ 26,350
Unpaid Principal Balance 29,808   29,808   27,986
With No Related Allowance Recorded 13,236   13,236   15,019
With an Allowance Recorded 14,264   14,264   11,331
Related Allowance 6,421   6,421   4,327
Average Recorded Investment 29,562 $ 24,306 29,850 $ 27,844  
Interest Income Recognized 476 478 1,320 1,766  
Real estate loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 19,466   19,466   21,757
Unpaid Principal Balance 21,442   21,442   23,258
With No Related Allowance Recorded 10,991   10,991   13,303
With an Allowance Recorded 8,476   8,476   8,454
Related Allowance 3,882   3,882   3,980
Average Recorded Investment 20,246 18,817 20,297 21,675  
Interest Income Recognized 395 397 1,082 1,497  
Real estate loans [Member] | Retail [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 1,475   1,475   1,678
Unpaid Principal Balance 1,495   1,495   1,684
With No Related Allowance Recorded 124   124   151
With an Allowance Recorded 1,351   1,351   1,527
Related Allowance 61   61   120
Average Recorded Investment 1,487 1,985 1,551 2,430  
Interest Income Recognized 24 31 85 117  
Real estate loans [Member] | Hospitality [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 6,288   6,288   6,227
Unpaid Principal Balance 7,233   7,233   6,823
With No Related Allowance Recorded 2,165   2,165   2,243
With an Allowance Recorded 4,123   4,123   3,984
Related Allowance 3,057   3,057   3,078
Average Recorded Investment 6,476 3,222 6,268 4,429  
Interest Income Recognized 143 66 309 367  
Real estate loans [Member] | Gas station [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 4,260   4,260   4,984
Unpaid Principal Balance 4,732   4,732   5,092
With No Related Allowance Recorded 4,155   4,155   4,984
With an Allowance Recorded 105   105   0
Related Allowance 0   0   0
Average Recorded Investment 4,603 4,557 4,764 4,772  
Interest Income Recognized 85 134 297 395  
Real estate loans [Member] | Other [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 4,777   4,777   6,070
Unpaid Principal Balance 5,170   5,170   6,808
With No Related Allowance Recorded 1,881   1,881   3,127
With an Allowance Recorded 2,897   2,897   2,943
Related Allowance 764   764   782
Average Recorded Investment 4,886 6,541 4,917 7,438  
Interest Income Recognized 117 138 304 533  
Real estate loans [Member] | Residential property [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 2,666   2,666   2,798
Unpaid Principal Balance 2,812   2,812   2,851
With No Related Allowance Recorded 2,666   2,666   2,798
With an Allowance Recorded 0   0   0
Related Allowance 0   0   0
Average Recorded Investment 2,794 2,512 2,797 2,606  
Interest Income Recognized 26 28 87 85  
Commercial and industrial loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 3,610   3,610   4,174
Unpaid Principal Balance 3,663   3,663   4,239
With No Related Allowance Recorded 542   542   1,297
With an Allowance Recorded 3,068   3,068   2,877
Related Allowance 531   531   347
Average Recorded Investment 4,555 4,807 4,592 5,481  
Interest Income Recognized 54 74 181 247  
Commercial and industrial loans [Member] | Commercial term [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 3,429   3,429   4,106
Unpaid Principal Balance 3,482   3,482   4,171
With No Related Allowance Recorded 361   361   1,229
With an Allowance Recorded 3,068   3,068   2,877
Related Allowance 531   531   347
Average Recorded Investment 3,495 4,792 3,739 5,032  
Interest Income Recognized 54 71 165 235  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 181   181   68
Unpaid Principal Balance 181   181   68
With No Related Allowance Recorded 181   181   68
With an Allowance Recorded 0   0   0
Related Allowance 0   0   0
Average Recorded Investment 1,060 15 853 29  
Interest Income Recognized 0 3 16 12  
Commercial and industrial loans [Member] | International loans [Member]          
Financing Receivable, Impaired [Line Items]          
Average Recorded Investment   0   420  
Interest Income Recognized   0   0  
Leases Receivable [Member] | International loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 3,378   3,378    
Unpaid Principal Balance 3,482   3,482    
With No Related Allowance Recorded 658   658    
With an Allowance Recorded 2,720   2,720    
Related Allowance 2,008   2,008    
Average Recorded Investment 3,560   4,044    
Interest Income Recognized 12   36    
Consumer loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 1,045   1,045   419
Unpaid Principal Balance 1,221   1,221   489
With No Related Allowance Recorded 1,045   1,045   419
With an Allowance Recorded 0   0   0
Related Allowance 0   0   $ 0
Average Recorded Investment 1,201 682 917 688  
Interest Income Recognized $ 15 $ 7 $ 21 $ 22