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
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans $ 3,449,310   $ 3,183,316      
Allowance 39,707   42,935      
Loans receivable, net 3,409,603   3,140,381      
Real estate loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 3,131,572   2,845,514      
Real estate loans [Member] | Hospitality [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 606,076   543,425      
Real estate loans [Member] | Gas station [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 280,761   323,655      
Real estate loans [Member] | Residential property [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 296,496   236,036      
Commercial and industrial loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 293,073   312,876      
Commercial and industrial loans [Member] | Commercial term [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 143,633   152,773      
Consumer loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 24,665   24,926      
PCI Loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 6,725   7,205      
Current 8,295   12,809      
Total Loans 15,020   20,014 $ 33,908    
Allowance 5,448 $ 5,645 5,441 1,352 $ 1,436 $ 1,026
Loans receivable, net 9,572   14,573 $ 32,556   $ 43,475
PCI Loans [Member] | Real estate loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 14,823   19,796      
PCI Loans [Member] | Real estate loans [Member] | Retail [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 1,193   1,376      
Current 1,350   3,473      
Total Loans 2,543   4,849      
Allowance 252   269      
Loans receivable, net 2,291   4,580      
PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 91   163      
Current 3,159   3,917      
Total Loans 3,250   4,080      
Allowance 32   88      
Loans receivable, net 3,218   3,992      
PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 390   457      
Current 2,498   3,835      
Total Loans 2,888   4,292      
Allowance 527   477      
Loans receivable, net 2,361   3,815      
PCI Loans [Member] | Real estate loans [Member] | Other [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 4,987   5,000      
Current 164   418      
Total Loans 5,151   5,418      
Allowance 4,503   4,412      
Loans receivable, net 648   1,006      
PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 6   158      
Current 985   999      
Total Loans 991   1,157      
Allowance 86   151      
Loans receivable, net 905   1,006      
PCI Loans [Member] | Commercial and industrial loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Total Loans 146   171      
PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 7   4      
Current 139   167      
Total Loans 146   171      
Allowance 41   42      
Loans receivable, net 105   129      
PCI Loans [Member] | Consumer loans [Member]            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 51   47      
Current     0      
Total Loans 51   47      
Allowance 7   2      
Loans receivable, net 44   45      
PCI Loans [Member] | 30-59 Days Past Due            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 192   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 190   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 2   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 69   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 58   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 11   0      
PCI Loans [Member] | 90 Days or More Past Due            
Financing Receivable, Recorded Investment, Past Due [Line Items]            
Past due loans receivable 6,464   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 945   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 91   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 390   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 4,985   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 6   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 7   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 $ 40   $ 47