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
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Financing Receivable, Impaired [Line Items]          
Recorded Investment $ 26,187   $ 26,187   $ 35,859
Unpaid Principal Balance 28,929   28,929   39,363
With No Related Allowance Recorded 20,530   20,530   23,985
With an Allowance Recorded 5,657   5,657   11,874
Related Allowance 3,011   3,011   4,445
Average Recorded Investment 26,318 $ 46,356 29,615 $ 46,837  
Interest Income Recognized 598 800 1,287 1,510  
Real estate loans [Member] | Retail [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 2,421   2,421   2,597
Unpaid Principal Balance 2,723   2,723   2,892
With No Related Allowance Recorded 1,997   1,997   2,435
With an Allowance Recorded 424   424   162
Related Allowance 31   31   27
Average Recorded Investment 2,434 4,278 2,653 5,134  
Interest Income Recognized 44 126 85 198  
Real estate loans [Member] | Hospitality [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 3,357   3,357   7,168
Unpaid Principal Balance 3,774   3,774   7,538
With No Related Allowance Recorded 3,255   3,255   2,873
With an Allowance Recorded 102   102   4,295
Related Allowance 2,496   2,496   3,068
Average Recorded Investment 3,362 7,128 5,032 6,700  
Interest Income Recognized 146 118 300 300  
Real estate loans [Member] | Gas station [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 4,623   4,623   5,393
Unpaid Principal Balance 5,162   5,162   5,815
With No Related Allowance Recorded 3,882   3,882   4,400
With an Allowance Recorded 741   741   993
Related Allowance 12   12   112
Average Recorded Investment 4,653 8,712 4,880 8,352  
Interest Income Recognized 99 189 261 282  
Real estate loans [Member] | Other [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 7,482   7,482   9,288
Unpaid Principal Balance 8,696   8,696   10,810
With No Related Allowance Recorded 7,088   7,088   7,219
With an Allowance Recorded 394   394   2,069
Related Allowance 50   50   647
Average Recorded Investment 7,525 11,294 7,887 10,774  
Interest Income Recognized 183 196 395 404  
Real estate loans [Member] | Construction [Member]          
Financing Receivable, Impaired [Line Items]          
Average Recorded Investment 0   0    
Interest Income Recognized 0   0    
Real estate loans [Member] | Residential property [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 2,529   2,529   2,895
Unpaid Principal Balance 2,576   2,576   3,081
With No Related Allowance Recorded 2,529   2,529   2,608
With an Allowance Recorded 0   0   287
Related Allowance 0   0   4
Average Recorded Investment 2,537 2,689 2,653 2,896  
Interest Income Recognized 27 28 57 60  
Commercial and industrial loans [Member] | Commercial term [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 5,066   5,066   5,257
Unpaid Principal Balance 5,127   5,127   5,621
With No Related Allowance Recorded 1,070   1,070   1,858
With an Allowance Recorded 3,996   3,996   3,399
Related Allowance 422   422   457
Average Recorded Investment 5,089 7,190 5,151 7,634  
Interest Income Recognized 87 97 164 196  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 23   23   381
Unpaid Principal Balance 123   123   493
With No Related Allowance Recorded 23   23   280
With an Allowance Recorded 0   0   101
Related Allowance 0   0   100
Average Recorded Investment 28 2,071 37 2,255  
Interest Income Recognized 4 29 9 36  
Commercial and industrial loans [Member] | International loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 0   0   1,215
Unpaid Principal Balance 0   0   1,215
With No Related Allowance Recorded 0   0   647
With an Allowance Recorded 0   0   568
Related Allowance 0   0   30
Average Recorded Investment 0 1,182 630 1,271  
Interest Income Recognized 0 0 0 0  
Consumer loans [Member]          
Financing Receivable, Impaired [Line Items]          
Recorded Investment 686   686   1,665
Unpaid Principal Balance 748   748   1,898
With No Related Allowance Recorded 686   686   1,665
With an Allowance Recorded 0   0   0
Related Allowance 0   0   $ 0
Average Recorded Investment 690 1,812 692 1,821  
Interest Income Recognized $ 8 $ 17 $ 16 $ 34