Annual report pursuant to Section 13 and 15(d)

Loans and Leases - Credit Quality of PCI Loan (Detail)

v3.6.0.2
Loans and Leases - Credit Quality of PCI Loan (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]        
Total $ 3,844,769 $ 3,183,316    
Allowance Amount 32,429 42,935    
Loans and leases receivable, net 3,812,340 3,140,381    
Real estate loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 3,278,375 2,845,514    
Real estate loans [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 859,953 740,350    
Real estate loans [Member] | Hotel/motel [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 651,158 543,425    
Real estate loans [Member] | Gas station [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 262,879 323,655    
Real estate loans [Member] | Residential property [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 338,767 236,036    
Commercial and industrial loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 300,220 312,876    
Commercial and industrial loans [Member] | Commercial term [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 138,168 152,773    
Consumer loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 22,880 24,926    
PCI Loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 9,863 20,014    
Allowance Amount 971 5,441 $ 1,026  
Loans and leases receivable, net 8,892 14,573 $ 43,475 $ 0
PCI Loans [Member] | Pass/Pass-Watch [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 1,153 1,185    
PCI Loans [Member] | Special Mention [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 1,180 176    
PCI Loans [Member] | Classified [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 7,530 18,653    
PCI Loans [Member] | Real estate loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 9,677 19,796    
PCI Loans [Member] | Real estate loans [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 2,324 4,849    
Allowance Amount 122 269    
Loans and leases receivable, net 2,202 4,580    
PCI Loans [Member] | Real estate loans [Member] | Hotel/motel [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 1,618 4,080    
Allowance Amount 138 88    
Loans and leases receivable, net 1,480 3,992    
PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 2,692 4,292    
Allowance Amount 589 477    
Loans and leases receivable, net 2,103 3,815    
PCI Loans [Member] | Real estate loans [Member] | Other [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 2,067 5,418    
Allowance Amount 1 4,412    
Loans and leases receivable, net 2,066 1,006    
PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 976 1,157    
Allowance Amount 72 151    
Loans and leases receivable, net 904 1,006    
PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Hotel/motel [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 177 186    
PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Gas station [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Other [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Real estate loans [Member] | Pass/Pass-Watch [Member] | Residential property [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 976 999    
PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Hotel/motel [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Gas station [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 1,180 176    
PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Other [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Real estate loans [Member] | Special Mention [Member] | Residential property [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Retail [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 2,324 4,849    
PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Hotel/motel [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 1,441 3,894    
PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Gas station [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 1,512 4,116    
PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Other [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 2,067 5,418    
PCI Loans [Member] | Real estate loans [Member] | Classified [Member] | Residential property [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 158    
PCI Loans [Member] | Commercial and industrial loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 136 171    
PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 136 171    
Allowance Amount 41 42    
Loans and leases receivable, net 95 129    
PCI Loans [Member] | Commercial and industrial loans [Member] | Pass/Pass-Watch [Member] | Commercial term [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Commercial and industrial loans [Member] | Special Mention [Member] | Commercial term [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Commercial and industrial loans [Member] | Classified [Member] | Commercial term [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 136 171    
PCI Loans [Member] | Consumer loans [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 50 47    
Allowance Amount 8 2    
Loans and leases receivable, net 42 45    
PCI Loans [Member] | Consumer loans [Member] | Pass/Pass-Watch [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Consumer loans [Member] | Special Mention [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total 0 0    
PCI Loans [Member] | Consumer loans [Member] | Classified [Member]        
Financing Receivable, Recorded Investment [Line Items]        
Total $ 50 $ 47