Quarterly report pursuant to Section 13 or 15(d)

Loans - Credit Quality of PCI Loan (Detail)

v3.3.0.814
Loans - Credit Quality of PCI Loan (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans $ 3,045,072   $ 2,788,498    
Allowance 46,360   52,666    
Loans receivable, net 2,998,712   2,735,832    
Real estate loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 2,739,554   2,512,425    
Real estate loans [Member] | Retail [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 722,437   686,486    
Real estate loans [Member] | Hospitality [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 549,583   468,082    
Real estate loans [Member] | Gas station [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 340,304   370,560    
Real estate loans [Member] | Other [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 902,897   854,142    
Real estate loans [Member] | Construction [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 26,228   9,532    
Commercial and industrial loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 280,784   248,462    
Commercial and industrial loans [Member] | Commercial term [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 121,848   116,061    
Consumer loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 24,734   27,611    
PCI Loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 25,145   44,501    
Allowance 3,138 $ 1,352 1,026    
Loans receivable, net 22,007   43,475 $ 67,024 $ 0
PCI Loans [Member] | Real estate loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 24,909   44,129    
PCI Loans [Member] | Real estate loans [Member] | Retail [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 7,268   10,343    
Allowance 203   401    
Loans receivable, net 7,065   9,942    
PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 5,435   12,862    
Allowance 290   99    
Loans receivable, net 5,145   12,763    
PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 5,786   7,745    
Allowance 108   302    
Loans receivable, net 5,678   7,443    
PCI Loans [Member] | Real estate loans [Member] | Other [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 5,385   10,680    
Allowance 2,318   65    
Loans receivable, net 3,067   10,615    
PCI Loans [Member] | Real estate loans [Member] | Construction [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 1,035   2,499    
Allowance 200   28    
Loans receivable, net 835   2,471    
PCI Loans [Member] | Commercial and industrial loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 193   327    
PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 193   327    
Allowance 17   131    
Loans receivable, net 176   196    
PCI Loans [Member] | Consumer loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 43   45    
Allowance 2   0    
Loans receivable, net 41   45    
Pass/Pass-Watch [Member] | PCI Loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 1,363   1,207    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Real estate loans [Member] | Retail [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 1,174   1,207    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 189   0    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Real estate loans [Member] | Other [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Real estate loans [Member] | Construction [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Consumer loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Special Mention [Member] | PCI Loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 187   1,461    
Special Mention [Member] | PCI Loans [Member] | Real estate loans [Member] | Retail [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   219    
Special Mention [Member] | PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Special Mention [Member] | PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 187   1,242    
Special Mention [Member] | PCI Loans [Member] | Real estate loans [Member] | Other [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Special Mention [Member] | PCI Loans [Member] | Real estate loans [Member] | Construction [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Special Mention [Member] | PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Special Mention [Member] | PCI Loans [Member] | Consumer loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 0   0    
Classified [Member] | PCI Loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 23,595   41,833    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Retail [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 6,094   8,917    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 5,246   12,862    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 5,599   6,503    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Other [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 5,385   10,680    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Construction [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 1,035   2,499    
Classified [Member] | PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans 193   327    
Classified [Member] | PCI Loans [Member] | Consumer loans [Member]          
Financing Receivable, Recorded Investment [Line Items]          
Total gross loans $ 43   $ 45