Quarterly report pursuant to Section 13 or 15(d)

Loans - Credit Quality of Loan Portfolio (Detail)

v3.4.0.3
Loans - Credit Quality of Loan Portfolio (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans $ 3,306,479 $ 3,183,316  
Real estate loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 2,986,015 2,845,514  
Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 776,718 740,350  
Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 548,807 543,425  
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 318,184 323,655  
Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 1,058,801 978,661  
Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 27,017 23,387  
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 256,488 236,036  
Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 295,632 312,876  
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 140,720 152,773  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 124,962 128,224  
Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 29,950 31,879  
Consumer loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 24,832 24,926  
Non-PCI Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,286,644 3,163,302 $ 2,775,616
Non-PCI Loans [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,228,077 3,085,409  
Non-PCI Loans [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 26,290 38,556  
Non-PCI Loans [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 32,277 39,337  
Non-PCI Loans [Member] | Real estate loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 2,966,390 2,825,718  
Non-PCI Loans [Member] | Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 772,454 735,501  
Non-PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 544,708 539,345  
Non-PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 313,571 319,363  
Non-PCI Loans [Member] | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 1,053,306 973,243  
Non-PCI Loans [Member] | Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 27,017 23,387  
Non-PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 255,334 234,879  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 764,216 722,483  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 526,393 517,462  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 306,330 309,598  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 1,039,280 953,839  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 27,017 23,387  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 254,407 232,862  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 4,826 9,519  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 6,636 9,604  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,772 5,897  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 6,352 8,662  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 0 0  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 52 58  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,412 3,499  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 11,679 12,279  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,469 3,868  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 7,674 10,742  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 0 0  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 875 1,959  
Non-PCI Loans [Member] | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 295,471 312,705  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 140,559 152,602  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 124,962 128,224  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 29,950 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 gross loans 134,120 145,773  
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 gross loans 124,659 127,579  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 27,940 29,719  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 2,366 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 gross loans 195 195  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 2,010 2,160  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Classified [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 4,073 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 gross loans 108 450  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Classified [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 0 0  
Non-PCI Loans [Member] | Consumer loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 24,783 24,879  
Non-PCI Loans [Member] | Consumer loans [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 23,715 22,707  
Non-PCI Loans [Member] | Consumer loans [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 81 91  
Non-PCI Loans [Member] | Consumer loans [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans $ 987 $ 2,081