XML 146 R54.htm IDEA: XBRL DOCUMENT v2.4.0.8
Loans - Age Analysis of Past Due Loans, Segregated by Class of Loans (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 30-89 Days Past Due $ 45,349    
Loans 90 or More Days Past Due 52,485    
Total Past Due Loans 97,834    
Current Loans 9,134,709    
Total loans 9,232,543 9,223,848 8,489,763
Accruing Loans 90 or More Days Past Due 11,224    
Commercial and industrial, Energy [Member]
      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 30-89 Days Past Due 397    
Loans 90 or More Days Past Due 758    
Total Past Due Loans 1,155    
Current Loans 1,016,182    
Total loans 1,017,337    
Accruing Loans 90 or More Days Past Due 530    
Commercial and industrial, Other commercial [Member]
      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 30-89 Days Past Due 13,841    
Loans 90 or More Days Past Due 18,173    
Total Past Due Loans 32,014    
Current Loans 3,723,266    
Total loans 3,755,280    
Accruing Loans 90 or More Days Past Due 6,570    
Commercial real estate, Buildings, land and other [Member]
      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 30-89 Days Past Due 15,248    
Loans 90 or More Days Past Due 29,484    
Total Past Due Loans 44,732    
Current Loans 2,737,793    
Total loans 2,782,525    
Accruing Loans 90 or More Days Past Due 430    
Commercial real estate, Construction [Member]
      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 30-89 Days Past Due 5,771    
Loans 90 or More Days Past Due 81    
Total Past Due Loans 5,852    
Current Loans 582,891    
Total loans 588,743    
Accruing Loans 90 or More Days Past Due 81    
Consumer Real Estate [Member]
      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 30-89 Days Past Due 5,989    
Loans 90 or More Days Past Due 3,504    
Total Past Due Loans 9,493    
Current Loans 775,712    
Total loans 785,205    
Accruing Loans 90 or More Days Past Due 3,205    
Consumer and Other [Member]
      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 30-89 Days Past Due 4,103    
Loans 90 or More Days Past Due 485    
Total Past Due Loans 4,588    
Current Loans 320,734    
Total loans 325,322    
Accruing Loans 90 or More Days Past Due 408    
Unearned discounts [Member]
      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 30-89 Days Past Due       
Loans 90 or More Days Past Due       
Total Past Due Loans       
Current Loans (21,869)    
Total loans (21,869)    
Accruing Loans 90 or More Days Past Due