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Loans (Details 5) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial $ 48,853   $ 49,381
Other loans held for sale 14,446 17,258 14,178
Total Commercial and industrial 738,432   787,736
Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Other loans held for sale 910    
Total Commercial and industrial 49,763   49,381
Grade 1 [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 2,782   2,966
Grade 1 [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Other loans held for sale 25    
Total Commercial and industrial 2,807    
Grade 2 [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 214   459
Grade 2 [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Total Commercial and industrial 214    
Grade 3 [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 10,522   11,380
Grade 3 [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Other loans held for sale 566    
Total Commercial and industrial 11,088    
Grade 4 [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 21,213   22,253
Grade 4 [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Other loans held for sale 319    
Total Commercial and industrial 21,532    
Grade W [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 8,513   5,292
Grade W [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Total Commercial and industrial 8,513    
Grade 5 [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 699   1,489
Grade 5 [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Total Commercial and industrial 699    
Grade 6 [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 4,249   4,929
Grade 6 [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Total Commercial and industrial 4,249    
Grade 7 [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 568   596
Grade 7 [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Total Commercial and industrial 568    
Not Graded [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Commercial and industrial 93   17
Not Graded [Member] | Commercial and industrial [Member]
     
Summary of Company's Internal credit quality indicators commercial and industrial      
Total Commercial and industrial $ 93