Annual report pursuant to Section 13 and 15(d)

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

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Loans - Analysis of Past Due Loans, Disaggregated by Loan Class (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due $ 3,607 $ 6,687
60-89 Days Past Due 4,072 3,175
90 Days or More Past Due 8,595 6,605
Total Past Due 16,274 16,467
Current 2,217,815 2,032,093
Total Loans 2,234,089 2,048,560
Accruing 90 Days or More Past Due     
Real estate loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 1,012,476 888,872
Real estate loans [Member] | Retail [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due     
60-89 Days Past Due 404 111
90 Days or More Past Due 2,196  
Total Past Due 2,600 111
Current 480,407 392,834
Total Loans 483,007 392,945
Accruing 90 Days or More Past Due     
Real estate loans [Member] | Land [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due     
60-89 Days Past Due     
90 Days or More Past Due    335
Total Past Due    335
Current 5,557 13,672
Total Loans 5,557 14,007
Accruing 90 Days or More Past Due     
Real estate loans [Member] | Other [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 411  
60-89 Days Past Due     
90 Days or More Past Due     
Total Past Due 411  
Current 444,423 380,142
Total Loans 444,834 380,142
Accruing 90 Days or More Past Due     
Real estate loans [Member] | Residential property [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due     
60-89 Days Past Due 122 588
90 Days or More Past Due 279 311
Total Past Due 401 899
Current 78,677 100,879
Total Loans 79,078 101,778
Accruing 90 Days or More Past Due     
Commercial and Industrial loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 1,189,108 1,123,012
Commercial and Industrial loans [Member] | Unsecured [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 224 918
60-89 Days Past Due 386 1,103
90 Days or More Past Due 1,159 1,279
Total Past Due 1,770 3,300
Current 105,843 106,872
Total Loans 107,613 110,172
Accruing 90 Days or More Past Due     
Commercial and Industrial loans [Member] | Secured by real estate [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 802 1,949
60-89 Days Past Due 952  
90 Days or More Past Due 1,012 926
Total Past Due 2,766 2,875
Current 819,269 771,317
Total Loans 822,035 774,192
Accruing 90 Days or More Past Due     
Commercial and Industrial loans [Member] | Commercial lines of credit [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due     
60-89 Days Past Due 150 188
90 Days or More Past Due 250 416
Total Past Due 400 604
Current 71,177 55,517
Total Loans 71,577 56,121
Accruing 90 Days or More Past Due     
Commercial and Industrial loans [Member] | SBA loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 1,859 3,759
60-89 Days Past Due 2,016 1,039
90 Days or More Past Due 3,622 2,800
Total Past Due 7,496 7,598
Current 144,034 140,708
Total Loans 151,530 148,306
Accruing 90 Days or More Past Due     
Commercial and Industrial loans [Member] | International loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due     
60-89 Days Past Due     
90 Days or More Past Due     
Total Past Due     
Current 36,353 34,221
Total Loans 36,353 34,221
Accruing 90 Days or More Past Due     
Consumer loans [Member]
    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 311 61
60-89 Days Past Due 42 146
90 Days or More Past Due 77 538
Total Past Due 430 745
Current 32,075 35,931
Total Loans 32,505 36,676
Accruing 90 Days or More Past Due