Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases - Analysis of Past Due Loans, Disaggregated by Loan Class, Non-PCI (Detail)

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Loans and Leases - Analysis of Past Due Loans, Disaggregated by Loan Class, Non-PCI (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable $ 3,943,951 $ 3,844,769  
Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 3,348,875 3,278,375  
Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 652,114 651,158  
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 256,060 262,879  
Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 56,072 55,962  
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 358,745 338,767  
Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 317,682 300,220  
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 135,596 138,168  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 144,279 136,231  
Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 37,807 25,821  
Leases Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 259,591 243,294  
Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 17,803 22,880  
30-59 Days Past Due | Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 80  
Non-PCI Loans and Leases [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 15,620 10,346  
Current 3,919,371 3,824,560  
Total Loans and leases receivable 3,934,991 3,834,906 $ 3,286,644
Non-PCI Loans and Leases [Member] | Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 3,340,085 3,268,698  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 475 380  
Current 907,957 857,249  
Total Loans and leases receivable 908,432 857,629  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 4,535 1,683  
Current 645,983 647,857  
Total Loans and leases receivable 650,518 649,540  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 2,456 1,025  
Current 250,981 259,162  
Total Loans and leases receivable 253,437 260,187  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 1,243 1,611  
Current 1,112,608 1,105,978  
Total Loans and leases receivable 1,113,851 1,107,589  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 0  
Current 56,072 55,962  
Total Loans and leases receivable 56,072 55,962  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 1,240 1,242  
Current 356,535 336,549  
Total Loans and leases receivable 357,775 337,791  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 317,562 300,084  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 865 637  
Current 134,611 137,395  
Total Loans and leases receivable 135,476 138,032  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 300 0  
Current 143,979 136,231  
Total Loans and leases receivable 144,279 136,231  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 80  
Current 37,807 25,741  
Total Loans and leases receivable 37,807 25,821  
Non-PCI Loans and Leases [Member] | Leases Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 4,261 3,518  
Current 255,330 239,776  
Total Loans and leases receivable 259,591 243,294  
Non-PCI Loans and Leases [Member] | Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 245 170  
Current 17,508 22,660  
Total Loans and leases receivable 17,753 22,830  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 10,158 5,277  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 241 9  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 4,429 1,037  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 1,699 245  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 891 432  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 778 730  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 212 484  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Leases Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 1,829 2,090  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 79 170  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 2,459 2,079  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 137  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 46  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 623 643  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 79  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 45 89  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 368 42  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 300 0  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Leases Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 997 1,043  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 126 0  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 3,003 2,990  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 234 234  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 106 600  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 134 137  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 352 1,100  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 417 423  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 285 111  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Leases Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 1,435 385  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable $ 40 $ 0