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
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable $ 4,073,062 $ 3,844,769  
Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 3,451,025 3,278,375  
Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 739,067 651,158  
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 249,929 262,879  
Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 58,159 55,962  
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 383,657 338,767  
Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 347,236 300,220  
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 159,487 138,168  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 148,421 136,231  
Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 39,328 25,821  
Leases Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 257,525 243,294  
Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans and leases receivable 17,276 22,880  
30-59 Days Past Due | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 281 564  
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 19,489 10,346  
Current 4,044,789 3,824,560  
Total Loans and leases receivable 4,064,278 3,834,906 $ 3,434,290
Non-PCI Loans and Leases [Member] | Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 11,566 5,941  
Current 3,430,774 3,262,757  
Total Loans and leases receivable 3,442,340 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 409 380  
Current 914,061 857,249  
Total Loans and leases receivable 914,470 857,629  
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 6,132 1,683  
Current 731,237 647,857  
Total Loans and leases receivable 737,369 649,540  
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 1,976 1,025  
Current 245,590 259,162  
Total Loans and leases receivable 247,566 260,187  
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 1,378 1,611  
Current 1,100,706 1,105,978  
Total Loans and leases receivable 1,102,084 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 58,159 55,962  
Total Loans and leases receivable 58,159 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 1,671 1,242  
Current 381,021 336,549  
Total Loans and leases receivable 382,692 337,791  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 1,071 717  
Current 346,110 299,367  
Total Loans and leases receivable 347,181 300,084  
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 976 637  
Current 158,456 137,395  
Total Loans and leases receivable 159,432 138,032  
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 95 0  
Current 148,326 136,231  
Total Loans and leases receivable 148,421 136,231  
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 39,328 25,741  
Total Loans and leases receivable 39,328 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 5,741 3,518  
Current 251,784 239,776  
Total Loans and leases receivable 257,525 243,294  
Non-PCI Loans and Leases [Member] | Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 1,111 170  
Current 16,121 22,660  
Total Loans and leases receivable 17,232 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 6,154 5,277  
Non-PCI Loans and Leases [Member] | 30-59 Days Past Due | Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 3,769 2,453  
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 128 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 1,336 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 264 245  
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 876 432  
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 1,165 730  
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 186 484  
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 95 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 1,983 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 121 170  
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 5,407 2,079  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 3,202 994  
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 138 137  
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 999 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 1,582 643  
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 433 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 50 89  
Non-PCI Loans and Leases [Member] | 60-89 Days Past Due | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 418 42  
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 418 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 0 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 1,787 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 0 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 7,928 2,990  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 4,595 2,494  
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 143 234  
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 3,797 600  
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 130 137  
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 69 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 456 423  
Non-PCI Loans and Leases [Member] | 90 Days or More Past Due | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past due loans and leases receivable 372 111  
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 372 111  
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 1,971 385  
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 $ 990 $ 0