Quarterly report pursuant to Section 13 or 15(d)

Loans - Credit Quality of Loan Portfolio (Detail)

v3.5.0.2
Loans - Credit Quality of Loan Portfolio (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans $ 3,449,310 $ 3,183,316  
Real estate loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,131,572 2,845,514  
Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 793,511 740,350  
Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 606,076 543,425  
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 280,761 323,655  
Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 1,128,346 978,661  
Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 26,382 23,387  
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 296,496 236,036  
Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 293,073 312,876  
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 143,633 152,773  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 121,326 128,224  
Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 28,114 31,879  
Consumer loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 24,665 24,926  
Non-PCI Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,434,290 3,163,302 $ 2,840,264
Non-PCI Loans [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,382,952 3,085,409  
Non-PCI Loans [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 23,952 38,556  
Non-PCI Loans [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 27,386 39,337  
Non-PCI Loans [Member] | Real estate loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 3,116,749 2,825,718  
Non-PCI Loans [Member] | Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 790,968 735,501  
Non-PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 602,826 539,345  
Non-PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 277,873 319,363  
Non-PCI Loans [Member] | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 1,123,195 973,243  
Non-PCI Loans [Member] | Real estate loans [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 26,382 23,387  
Non-PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 295,505 234,879  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 783,397 722,483  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 589,285 517,462  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 269,141 309,598  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 1,110,781 953,839  
Non-PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Construction [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 26,382 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 294,906 232,862  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 4,786 9,519  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 6,266 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 3,260 5,897  
Non-PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 5,203 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 53 58  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Retail [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 2,785 3,499  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 7,275 12,279  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 5,472 3,868  
Non-PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Other [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 7,211 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 546 1,959  
Non-PCI Loans [Member] | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 292,927 312,705  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 143,487 152,602  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 121,326 128,224  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 28,114 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 138,316 145,773  
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 121,108 127,579  
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 25,994 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 2,064 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 2,120 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 3,107 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 23 450  
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 24,614 24,879  
Non-PCI Loans [Member] | Consumer loans [Member] | Pass/Pass-Watch [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 23,642 22,707  
Non-PCI Loans [Member] | Consumer loans [Member] | Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans 5 91  
Non-PCI Loans [Member] | Consumer loans [Member] | Classified [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total gross loans $ 967 $ 2,081