Quarterly report pursuant to Section 13 or 15(d)

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

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Analysis of Past Due Loans, Disaggregated by Class of Loans (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due $ 4,175 $ 4,748  
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due 1,579 9,199  
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 14,485 21,244  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale 20,239 35,191  
Financing Receivable, Recorded Investment, Current 1,938,051 1,903,549  
Total Gross Loans 1,958,290 1,938,740 1,992,031
Loans 90 Days or More Past Due and Still Accruing        
Real Estate Loan [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Gross Loans 840,061 749,920 754,472
Real Estate Loan [Member] | Retail [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due   485  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale   485  
Financing Receivable, Recorded Investment, Current 370,368 311,972  
Total Gross Loans 370,368 312,457  
Loans 90 Days or More Past Due and Still Accruing        
Real Estate Loan [Member] | Land [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, Current 16,962 7,769  
Total Gross Loans 16,962 7,769  
Loans 90 Days or More Past Due and Still Accruing        
Real Estate Loan [Member] | Other [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, Current 341,089 342,797  
Total Gross Loans 341,089 342,797  
Loans 90 Days or More Past Due and Still Accruing        
Real Estate Loan [Member] | Construction [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 7,868 8,310  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale 7,868 8,310  
Financing Receivable, Recorded Investment, Current   25,666  
Total Gross Loans 7,868 33,976  
Loans 90 Days or More Past Due and Still Accruing        
Real Estate Loan [Member] | Residential Property [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due 512 277  
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due 241 1,613  
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 319 2,221  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale 1,072 4,111  
Financing Receivable, Recorded Investment, Current 102,702 48,810  
Total Gross Loans 103,774 52,921  
Loans 90 Days or More Past Due and Still Accruing        
Commercial and Industrial Loans [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Gross Loans 1,079,814 1,145,474 1,192,740
Commercial and Industrial Loans [Member] | Unsecured [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due 1,125 438  
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due 731 611  
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 613 1,833  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale 2,469 2,882  
Financing Receivable, Recorded Investment, Current 115,671 148,398  
Total Gross Loans 118,140 151,280  
Loans 90 Days or More Past Due and Still Accruing        
Commercial and Industrial Loans [Member] | Secured by Real Estate [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due   3,162  
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due   6,496  
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 1,921 1,202  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale 1,921 10,860  
Financing Receivable, Recorded Investment, Current 741,845 782,696  
Total Gross Loans 743,766 793,556  
Loans 90 Days or More Past Due and Still Accruing        
Commercial and Industrial Loans [Member] | Commercial Lines of Credit [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 416 416  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale 416 416  
Financing Receivable, Recorded Investment, Current 53,850 55,354  
Total Gross Loans 54,266 [1] 55,770 [1]  
Loans 90 Days or More Past Due and Still Accruing        
Commercial and Industrial Loans [Member] | SBA Loans [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due 2,267 260  
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due 592 472  
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 3,212 7,108  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale 6,071 7,840  
Financing Receivable, Recorded Investment, Current 128,193 108,352  
Total Gross Loans 134,264 [2] 116,192 [2]  
Loans 90 Days or More Past Due and Still Accruing        
Commercial and Industrial Loans [Member] | International Loans [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, Current 29,378 28,676  
Total Gross Loans 29,378 28,676  
Loans 90 Days or More Past Due and Still Accruing        
Consumer Loans [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Gross Loans 38,415 43,346 44,819
Consumer Loans [Member] | Consumer Loans [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Recorded Investment, 30 to 59 Days Past Due 271 126  
Financing Receivable, Recorded Investment, 60 to 89 Days Past Due 15 7  
Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 136 154  
Delinquent loans (defined as 30 days or more past due), excluding loans held for sale 422 287  
Financing Receivable, Recorded Investment, Current 37,993 43,059  
Total Gross Loans 38,415 43,346  
Loans 90 Days or More Past Due and Still Accruing        
[1] Includes owner-occupied property loans of $1.3 million and $936,000 as of September 30, 2012 and December 31, 2011, respectively.
[2] Includes owner-occupied property loans of $115.3 million and $93.6 million as of September 30, 2012 and December 31, 2011, respectively.