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
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable $ 4,073,062 $ 3,844,769  
Real estate loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 3,451,025 3,278,375  
Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 916,113 859,953  
Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 739,067 651,158  
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 249,929 262,879  
Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 1,104,100 1,109,656  
Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 58,159 55,962  
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 383,657 338,767  
Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 347,236 300,220  
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 159,487 138,168  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 148,421 136,231  
Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 39,328 25,821  
Leases Receivable [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 257,525 243,294  
Consumer loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 17,276 22,880  
Non-PCI Loans and Leases [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 4,064,278 3,834,906 $ 3,434,290
Non-PCI Loans and Leases [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 4,017,670 3,788,374  
Non-PCI Loans and Leases [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 21,351 16,267  
Non-PCI Loans and Leases [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 25,257 30,265  
Non-PCI Loans and Leases [Member] | Real estate loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 3,442,340 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 914,470 857,629  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 737,369 649,540  
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 247,566 260,187  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 1,102,084 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 58,159 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 382,692 337,791  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 3,406,358 3,230,926  
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 909,076 851,147  
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 724,423 634,397  
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 243,388 252,123  
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 1,089,244 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 58,159 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 382,068 337,227  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 19,208 11,328  
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 1,601 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 5,798 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 2,006 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 9,483 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 320 0  
Non-PCI Loans and Leases [Member] | Real estate loans [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 16,774 26,444  
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 3,793 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 7,148 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 2,172 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 3,357 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 304 564  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross 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 [Line Items]      
Total gross 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 [Line Items]      
Total gross 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 [Line Items]      
Total gross loans and leases receivable 39,328 25,821  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 341,475 292,916  
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 155,226 133,811  
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 146,921 135,699  
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 39,328 23,406  
Non-PCI Loans and Leases [Member] | Commercial and industrial loans [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 2,143 4,939  
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 2,143 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 0 464  
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]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 3,563 2,229  
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 2,063 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 1,500 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 257,525 243,294  
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 253,881 242,393  
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 3,644 901  
Non-PCI Loans and Leases [Member] | Consumer loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans and leases receivable 17,232 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 15,956 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 $ 1,276 $ 691