v2.4.0.6
Goodwill and Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Goodwill and Intangible Assets Gross Carrying Value [Abstract]      
Goodwill not subject to amortization $ 29,513 $ 29,513  
Intangibles from branch acquisition 3,015 3,015  
Core deposit intangibles 8,986 8,986  
Customer list intangibles 1,904 1,904  
Total Goodwill and Intangible Assets, Gross Carrying Value 43,418 43,418  
Goodwill and Intangible Assets Accumulated Amortization [Abstract]      
Goodwill not subject to amortization (effective 1/1/02), Accumulated Amortization 3,760 3,760  
Total Goodwill and Intangible Assets, Accumulated Amortization 14,504 13,731  
Total Amortization Expense [Abstract]      
Amortization of intangible assets 773 1,134 814
Estimated amortization expense [Abstract]      
For period ended 12/31/13 673    
For period ended 12/31/14 643    
For year ended 12/31/15 616    
For year ended 12/31/16 381    
For year ended 12/31/17 254    
Intangibles from branch acquisitions
      
Goodwill and Intangible Assets Accumulated Amortization [Abstract]      
Intangible Assets, Accumulated Amortization 3,015 2,965  
Total Amortization Expense [Abstract]      
Amortization of intangible assets 50 201 201
Core deposit intangibles
      
Goodwill and Intangible Assets Accumulated Amortization [Abstract]      
Intangible Assets, Accumulated Amortization 5,825 5,119  
Total Amortization Expense [Abstract]      
Amortization of intangible assets 706 743 423
Customer list intangibles
      
Goodwill and Intangible Assets Accumulated Amortization [Abstract]      
Intangible Assets, Accumulated Amortization 1,904 1,887  
Total Amortization Expense [Abstract]      
Amortization of intangible assets $ 17 $ 190 $ 190