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Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Gross unrealized losses, aggregated by investment category and length of time    
Gross unrealized losses, less than twelve months $ (227) $ (37)
Fair value, less than twelve months 46,505 12,844
Gross unrealized losses, twelve months & over      
Fair value, twelve months & over      
U.S. Treasury [Member]
    
Gross unrealized losses, aggregated by investment category and length of time    
Gross unrealized losses, less than twelve months (36)  
Fair value, less than twelve months 10,568  
Gross unrealized losses, twelve months & over      
Fair value, twelve months & over      
U.S. Government agency [Member]
    
Gross unrealized losses, aggregated by investment category and length of time    
Gross unrealized losses, less than twelve months (171) (18)
Fair value, less than twelve months 33,034 12,192
Gross unrealized losses, twelve months & over      
Fair value, twelve months & over      
Mortgage-backed securities [Member]
    
Gross unrealized losses, aggregated by investment category and length of time    
Gross unrealized losses, less than twelve months    (18)
Fair value, less than twelve months      
Gross unrealized losses, twelve months & over      
Fair value, twelve months & over      
State and local governments [Member]
    
Gross unrealized losses, aggregated by investment category and length of time    
Gross unrealized losses, less than twelve months (20) (1)
Fair value, less than twelve months 2,903 652
Gross unrealized losses, twelve months & over      
Fair value, twelve months & over