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Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Summary of investments in unrealized loss position that were temporarily impaired    
Less than 12 months - Fair Value $ 27,935  
12 months or more - Fair Value     
Total - Fair Value 27,935  
Summary of investments in unrealized loss position that were temporarily impaired, Unrealized (Loss)    
Less than 12 months - Unrealized (Loss) (313)  
12 months or more - Unrealized (Loss)     
Total Unrealized (Loss) (313)  
U.S. agency and mortgage-backed securities [Member]
    
Summary of investments in unrealized loss position that were temporarily impaired    
Less than 12 months - Fair Value 23,118 3,955
12 months or more - Fair Value      
Total - Fair Value 23,118 3,955
Summary of investments in unrealized loss position that were temporarily impaired, Unrealized (Loss)    
Less than 12 months - Unrealized (Loss) (230) (16)
12 months or more - Unrealized (Loss)      
Total Unrealized (Loss) (230) (16)
Obligations of states and political subdivisions [Member]
    
Summary of investments in unrealized loss position that were temporarily impaired    
Less than 12 months - Fair Value 4,817  
12 months or more - Fair Value     
Total - Fair Value 4,817  
Summary of investments in unrealized loss position that were temporarily impaired, Unrealized (Loss)    
Less than 12 months - Unrealized (Loss) (83)  
12 months or more - Unrealized (Loss)     
Total Unrealized (Loss) $ (83)