Quarterly report pursuant to Section 13 or 15(d)

Loans - Analysis of Past Due Loans, Disaggregated by Loan Class, PCI (Detail) (Details)

v3.5.0.2
Loans - Analysis of Past Due Loans, Disaggregated by Loan Class, PCI (Detail) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans $ 3,552,659   $ 3,183,316      
Allowance 38,972   42,935      
Loans receivable, net 3,513,687   3,140,381      
Real estate loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 3,210,687   2,845,514      
Real estate loans [Member] | Hospitality [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 622,280   543,425      
Real estate loans [Member] | Gas station [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 274,385   323,655      
Real estate loans [Member] | Residential property [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 330,675   236,036      
Commercial and industrial loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 319,656   312,876      
Commercial and industrial loans [Member] | Commercial term [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 144,889   152,773      
Consumer loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 22,316   24,926      
PCI Loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 6,446   7,205      
Current 9,094   12,809      
Total Loans 15,540   20,014 $ 25,145    
Allowance 5,533 $ 5,448 5,441 3,138 $ 1,352 $ 1,026
Loans receivable, net 10,007   14,573 $ 22,007   $ 43,475
PCI Loans [Member] | Real estate loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 15,355   19,796      
PCI Loans [Member] | Real estate loans [Member] | Retail [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 966   1,376      
Current 1,504   3,473      
Total Loans 2,470   4,849      
Allowance 282   269      
Loans receivable, net 2,188   4,580      
PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 97   163      
Current 3,828   3,917      
Total Loans 3,925   4,080      
Allowance 52   88      
Loans receivable, net 3,873   3,992      
PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 336   457      
Current 2,497   3,835      
Total Loans 2,833   4,292      
Allowance 575   477      
Loans receivable, net 2,258   3,815      
PCI Loans [Member] | Real estate loans [Member] | Other [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 4,991   5,000      
Current 156   418      
Total Loans 5,147   5,418      
Allowance 4,495   4,412      
Loans receivable, net 652   1,006      
PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   158      
Current 980   999      
Total Loans 980   1,157      
Allowance 80   151      
Loans receivable, net 900   1,006      
PCI Loans [Member] | Commercial and industrial loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 135   171      
PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 6   4      
Current 129   167      
Total Loans 135   171      
Allowance 42   42      
Loans receivable, net 93   129      
PCI Loans [Member] | Consumer loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 50   47      
Current     0      
Total Loans 50   47      
Allowance 7   2      
Loans receivable, net 43   45      
PCI Loans [Member] | 30-59 Days Past Due            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   4      
PCI Loans [Member] | 30-59 Days Past Due | Real estate loans [Member] | Retail [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   0      
PCI Loans [Member] | 30-59 Days Past Due | Real estate loans [Member] | Hospitality [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable     0      
PCI Loans [Member] | 30-59 Days Past Due | Real estate loans [Member] | Gas station [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   0      
PCI Loans [Member] | 30-59 Days Past Due | Real estate loans [Member] | Other [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   4      
PCI Loans [Member] | 30-59 Days Past Due | Real estate loans [Member] | Residential property [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable     0      
PCI Loans [Member] | 30-59 Days Past Due | Commercial and industrial loans [Member] | Commercial term [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable     0      
PCI Loans [Member] | 30-59 Days Past Due | Consumer loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable     0      
PCI Loans [Member] | 60-89 Days Past Due            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   276      
PCI Loans [Member] | 60-89 Days Past Due | Real estate loans [Member] | Retail [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   267      
PCI Loans [Member] | 60-89 Days Past Due | Real estate loans [Member] | Hospitality [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable     9      
PCI Loans [Member] | 60-89 Days Past Due | Real estate loans [Member] | Gas station [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable     0      
PCI Loans [Member] | 60-89 Days Past Due | Real estate loans [Member] | Other [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable     0      
PCI Loans [Member] | 60-89 Days Past Due | Real estate loans [Member] | Residential property [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable     0      
PCI Loans [Member] | 60-89 Days Past Due | Commercial and industrial loans [Member] | Commercial term [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   0      
PCI Loans [Member] | 60-89 Days Past Due | Consumer loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   0      
PCI Loans [Member] | 90 Days or More Past Due            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 6,446   6,925      
PCI Loans [Member] | 90 Days or More Past Due | Real estate loans [Member] | Retail [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 966   1,109      
PCI Loans [Member] | 90 Days or More Past Due | Real estate loans [Member] | Hospitality [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 97   154      
PCI Loans [Member] | 90 Days or More Past Due | Real estate loans [Member] | Gas station [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 336   457      
PCI Loans [Member] | 90 Days or More Past Due | Real estate loans [Member] | Other [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 4,991   4,996      
PCI Loans [Member] | 90 Days or More Past Due | Real estate loans [Member] | Residential property [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 0   158      
PCI Loans [Member] | 90 Days or More Past Due | Commercial and industrial loans [Member] | Commercial term [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 6   4      
PCI Loans [Member] | 90 Days or More Past Due | Consumer loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable $ 50   $ 47