Quarterly report pursuant to Section 13 or 15(d)

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

v3.2.0.727
Loans - Analysis of Past Due Loans, Disaggregated by Loan Class, PCI (Detail) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans $ 2,874,172   $ 2,785,261
Allowance 50,820   52,666
Loans receivable, net 2,826,086   2,735,832
Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 2,586,666   2,508,515
Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 502,634   467,361
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 343,521   369,985
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 173,126   123,431
Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 261,189   249,189
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 111,943   116,400
Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 26,317   27,557
PCI Loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 1,866   1,574
60-89 Days Past Due 0   1,357
90 Days or More Past Due 19,188   28,475
Total Past Due 21,054   31,406
Current 12,854   13,095
Total Loans 33,908   44,501
Allowance 1,352 $ 1,436 1,026
Loans receivable, net 32,556   43,475
PCI Loans [Member] | Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 33,598   44,129
Allowance 1,289 1,318 895
PCI Loans [Member] | Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 1,759   93
60-89 Days Past Due 0   287
90 Days or More Past Due 4,851   5,623
Total Past Due 6,610   6,003
Current 2,748   4,340
Total Loans 9,358   10,343
Allowance 257   401
Loans receivable, net 9,101   9,942
PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 36   312
60-89 Days Past Due 0   0
90 Days or More Past Due 5,614   7,670
Total Past Due 5,650   7,982
Current 4,695   4,880
Total Loans 10,345   12,862
Allowance 317   99
Loans receivable, net 10,028   12,763
PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 63   1,139
60-89 Days Past Due 0   1,053
90 Days or More Past Due 1,874   3,178
Total Past Due 1,937   5,370
Current 4,018   2,375
Total Loans 5,955   7,745
Allowance 503   302
Loans receivable, net 5,452   7,443
PCI Loans [Member] | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 8   0
60-89 Days Past Due 0   0
90 Days or More Past Due 5,330   10,119
Total Past Due 5,338   10,119
Current 547   561
Total Loans 5,885   10,680
Allowance 16   65
Loans receivable, net 5,869   10,615
PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 0   0
60-89 Days Past Due 0   0
90 Days or More Past Due 1,406   1,722
Total Past Due 1,406   1,722
Current 649   777
Total Loans 2,055   2,499
Allowance 196   28
Loans receivable, net 1,859   2,471
PCI Loans [Member] | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 267   327
Allowance 63 118 131
PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 0   30
60-89 Days Past Due 0   0
90 Days or More Past Due 70   135
Total Past Due 70   165
Current 197   162
Total Loans 267   327
Allowance 63   131
Loans receivable, net 204   196
PCI Loans [Member] | Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 0   0
60-89 Days Past Due 0   17
90 Days or More Past Due 43   28
Total Past Due 43   45
Current 0   0
Total Loans 43   45
Allowance 0 $ 0 0
Loans receivable, net $ 43   $ 45