Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Loans and Leases - Credit Quality of Loan and Lease Portfolio (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable $ 3,943,951 $ 3,844,769  
Real estate loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 3,348,875 3,278,375  
Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 909,986 859,953  
Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 652,114 651,158  
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 256,060 262,879  
Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 1,115,898 1,109,656  
Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 56,072 55,962  
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 358,745 338,767  
Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 317,682 300,220  
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 135,596 138,168  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 144,279 136,231  
Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 37,807 25,821  
Leases Receivable [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 259,591 243,294  
Consumer loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 17,803 22,880  
Non-PCI Loans and Leases [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 3,934,991 3,834,906 $ 3,286,644
Non-PCI Loans and Leases [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 3,897,046 3,788,374  
Non-PCI Loans and Leases [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 13,420 16,267  
Non-PCI Loans and Leases [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 24,525 30,265  
Non-PCI Loans and Leases [Member] | Real estate loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross 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 [Line Items]      
Total gross loans and leases receivable 908,432 857,629  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross 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 [Line Items]      
Total gross loans and leases receivable 253,437 260,187  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross 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 [Line Items]      
Total gross 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 [Line Items]      
Total gross loans and leases receivable 357,775 337,791  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 902,614 851,147  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 636,396 634,397  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 249,125 252,123  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 1,106,847 1,100,070  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 56,072 55,962  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 357,543 337,227  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Special Mention [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 1,652 2,275  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Special Mention [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 4,515 5,497  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Special Mention [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 2,029 1,911  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Special Mention [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 2,794 1,645  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Special Mention [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Special Mention [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Classified [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 4,166 4,207  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Classified [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 9,607 9,646  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Classified [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 2,283 6,153  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Classified [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 4,210 5,874  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Classified [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Classified [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 232 564  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross 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 [Line Items]      
Total gross 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 [Line Items]      
Total gross 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 [Line Items]      
Total gross loans and leases receivable 37,807 25,821  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 131,424 133,811  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 143,979 135,699  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 37,807 23,406  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 2,130 2,060  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 300 464  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 0 2,415  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Classified [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 1,922 2,161  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Classified [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 0 68  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Classified [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | Leases Receivable [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 259,591 243,294  
Non-PCI Loans and Leases [Member] | Leases Receivable [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 257,947 242,393  
Non-PCI Loans and Leases [Member] | Leases Receivable [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | Leases Receivable [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 1,644 901  
Non-PCI Loans and Leases [Member] | Consumer loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 17,753 22,830  
Non-PCI Loans and Leases [Member] | Consumer loans [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 17,292 22,139  
Non-PCI Loans and Leases [Member] | Consumer loans [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 0 0  
Non-PCI Loans and Leases [Member] | Consumer loans [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable $ 461 $ 691