Annual report pursuant to Section 13 and 15(d)

Loans and Leases - Credit Quality of Loans and Leases Portfolio (Detail)

v3.6.0.2
Loans and Leases - Credit Quality of Loans and Leases Portfolio (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases $ 3,844,769 $ 3,183,316
Real estate loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 3,278,375 2,845,514
Real estate loans [Member] | Retail [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 859,953 740,350
Real estate loans [Member] | Hotel/motel [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 651,158 543,425
Real estate loans [Member] | Gas station [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 262,879 323,655
Real estate loans [Member] | Other [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 1,109,656 978,661
Real estate loans [Member] | Construction [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 55,962 23,387
Real estate loans [Member] | Residential property [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 338,767 236,036
Commercial and industrial loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 300,220 312,876
Commercial and industrial loans [Member] | Commercial term [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 138,168 152,773
Commercial and industrial loans [Member] | Commercial lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 136,231 128,224
Commercial and industrial loans [Member] | International loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 25,821 31,879
Leases Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 243,294 0
Consumer loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 22,880 24,926
Non-PCI Loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 3,834,906 3,163,302
Non-PCI Loans [Member] | Pass/Pass-Watch [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 3,788,374 3,085,409
Non-PCI Loans [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 16,267 38,556
Non-PCI Loans [Member] | Classified [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 30,265 39,337
Non-PCI Loans [Member] | Real estate loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 3,268,698 2,825,718
Non-PCI Loans [Member] | Real estate loans [Member] | Retail [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 857,629 735,501
Non-PCI Loans [Member] | Real estate loans [Member] | Hotel/motel [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 649,540 539,345
Non-PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 260,187 319,363
Non-PCI Loans [Member] | Real estate loans [Member] | Other [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 1,107,589 973,243
Non-PCI Loans [Member] | Real estate loans [Member] | Construction [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 55,962 23,387
Non-PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 337,791 234,879
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Retail [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 851,147 722,483
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Hotel/motel [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 634,397 517,462
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Gas station [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 252,123 309,598
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Other [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 1,100,070 953,839
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Construction [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 55,962 23,387
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Residential property [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 337,227 232,862
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Retail [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 2,275 9,519
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Hotel/motel [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 5,497 9,604
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Gas station [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 1,911 5,897
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Other [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 1,645 8,662
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Construction [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 0 0
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Residential property [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 0 58
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Retail [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 4,207 3,499
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Hotel/motel [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 9,646 12,279
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Gas station [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 6,153 3,868
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Other [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 5,874 10,742
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Construction [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 0 0
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Residential property [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 564 1,959
Non-PCI Loans [Member] | Commercial and industrial loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 300,084 312,705
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 138,032 152,602
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 136,231 128,224
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | International loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 25,821 31,879
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member] | Commercial term [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 133,811 145,773
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member] | Commercial lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 135,699 127,579
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member] | International loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 23,406 29,719
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | Commercial term [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 2,060 2,370
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | Commercial lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 464 195
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | International loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 2,415 2,160
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Classified [Member] | Commercial term [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 2,161 4,459
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Classified [Member] | Commercial lines of credit [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 68 450
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Classified [Member] | International loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 0 0
Non-PCI Loans [Member] | Leases Receivable [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 243,294 0
Non-PCI Loans [Member] | Leases Receivable [Member] | Pass/Pass-Watch [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 242,393  
Non-PCI Loans [Member] | Leases Receivable [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 0  
Non-PCI Loans [Member] | Leases Receivable [Member] | Classified [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 901  
Non-PCI Loans [Member] | Consumer loans [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 22,830 24,879
Non-PCI Loans [Member] | Consumer loans [Member] | Pass/Pass-Watch [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 22,139 22,707
Non-PCI Loans [Member] | Consumer loans [Member] | Special Mention [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases 0 91
Non-PCI Loans [Member] | Consumer loans [Member] | Classified [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans and Leases $ 691 $ 2,081