Quarterly report pursuant to Section 13 or 15(d)

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

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Loans - Analysis of Past Due Loans, Disaggregated by Loan Class, Non-PCI (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans $ 2,874,172 $ 2,785,261  
Accruing 90 Days or More Past Due 0 0  
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] | Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 21,310 9,517  
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  
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 115,382 93,860  
Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 33,864 38,929  
Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 26,317 27,557  
Non-PCI Loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 7,814 9,713  
60-89 Days Past Due 3,218 6,729  
90 Days or More Past Due 12,498 7,857  
Total Past Due 23,530 24,299  
Current 2,816,734 2,716,461  
Total Loans 2,840,264 2,740,760 $ 2,349,235
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Real estate loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 2,553,068 2,464,386 2,090,083
Non-PCI Loans [Member] | Real estate loans [Member] | Retail [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 543 1,554  
60-89 Days Past Due 177 281  
90 Days or More Past Due 1,166 1,920  
Total Past Due 1,886 3,755  
Current 688,211 671,317  
Total Loans 690,097 675,072  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Real estate loans [Member] | Hospitality [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 3,837 1,531  
60-89 Days Past Due 0 2,340  
90 Days or More Past Due 4,356 433  
Total Past Due 8,193 4,304  
Current 484,096 450,195  
Total Loans 492,289 454,499  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 1,085 2,991  
60-89 Days Past Due 1,687 1,113  
90 Days or More Past Due 842 353  
Total Past Due 3,614 4,457  
Current 333,952 357,783  
Total Loans 337,566 362,240  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Real estate loans [Member] | Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 1,209 1,674  
60-89 Days Past Due 447 2,156  
90 Days or More Past Due 3,477 1,142  
Total Past Due 5,133 4,972  
Current 835,602 837,154  
Total Loans 840,735 842,126  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Real estate loans [Member] | Construction [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 0 0  
Total Past Due 0 0  
Current 21,310 9,517  
Total Loans 21,310 9,517  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 0 167  
60-89 Days Past Due 0 0  
90 Days or More Past Due 108 687  
Total Past Due 108 854  
Current 170,963 120,078  
Total Loans 171,071 120,932  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Commercial and industrial loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 260,922 248,862 230,309
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 390 1,107  
60-89 Days Past Due 337 490  
90 Days or More Past Due 1,991 2,847  
Total Past Due 2,718 4,444  
Current 108,958 111,629  
Total Loans 111,676 116,073  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 500 0  
60-89 Days Past Due 570 0  
90 Days or More Past Due 220 227  
Total Past Due 1,290 227  
Current 114,092 93,633  
Total Loans 115,382 93,860  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 0 200  
60-89 Days Past Due 0 0  
90 Days or More Past Due 0 0  
Total Past Due 0 200  
Current 33,864 38,729  
Total Loans 33,864 38,929  
Accruing 90 Days or More Past Due 0 0  
Non-PCI Loans [Member] | Consumer loans [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
30-59 Days Past Due 250 489  
60-89 Days Past Due 0 349  
90 Days or More Past Due 338 248  
Total Past Due 588 1,086  
Current 25,686 26,426  
Total Loans 26,274 27,512 $ 28,843
Accruing 90 Days or More Past Due $ 0 $ 0