Quarterly report pursuant to Section 13 or 15(d)

Loans - Credit Quality of PCI Loan (Detail)

v3.4.0.3
Loans - Credit Quality of PCI Loan (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans $ 3,306,479 $ 3,183,316    
Allowance 41,026 42,935    
Loans receivable, net 3,265,453 3,140,381    
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] | 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    
Consumer loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 24,832 24,926    
PCI Loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 19,835 20,014 $ 40,941  
Allowance 5,645 5,441 1,436 $ 1,026
Loans receivable, net 14,190 14,573 $ 39,505 $ 43,475
PCI Loans [Member] | Real estate loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 19,625 19,796    
PCI Loans [Member] | Real estate loans [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 4,264 4,849    
Allowance 421 269    
Loans receivable, net 3,843 4,580    
PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 4,099 4,080    
Allowance 0 88    
Loans receivable, net 4,099 3,992    
PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 4,613 4,292    
Allowance 484 477    
Loans receivable, net 4,129 3,815    
PCI Loans [Member] | Real estate loans [Member] | Other [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 5,495 5,418    
Allowance 4,497 4,412    
Loans receivable, net 998 1,006    
PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 1,154 1,157    
Allowance 197 151    
Loans receivable, net 957 1,006    
PCI Loans [Member] | Commercial and industrial loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 161 171    
PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 161 171    
Allowance 44 42    
Loans receivable, net 117 129    
PCI Loans [Member] | Consumer loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 49 47    
Allowance 2 2    
Loans receivable, net 47 45    
Pass/Pass-Watch [Member] | PCI Loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 1,260 1,185    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Real estate loans [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 0 0    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 184 186    
Pass/Pass-Watch [Member] | PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 85 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] | Residential property [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 991 999    
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 166 176    
Special Mention [Member] | PCI Loans [Member] | Real estate loans [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 0 0    
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 166 176    
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] | Residential property [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 18,409 18,653    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 4,264 4,849    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 3,915 3,894    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 4,362 4,116    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Other [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 5,495 5,418    
Classified [Member] | PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 163 158    
Classified [Member] | PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans 161 171    
Classified [Member] | PCI Loans [Member] | Consumer loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total gross loans $ 49 $ 47