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Securities (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Available for sale:    
Amortized Costs $ 185,243  
Gross Unrealized Gains 4,748  
Gross Unrealized Losses 223  
Fair Values 189,768 174,918
U.S. Treasury [Member]
   
Available for sale:    
Amortized Costs 2,007  
Gross Unrealized Gains 102  
Gross Unrealized Losses 0  
Fair Values 2,109  
U.S. Government agencies [Member]
   
Available for sale:    
Amortized Costs 113,016  
Gross Unrealized Gains 1,738  
Gross Unrealized Losses 11  
Fair Values 114,743  
Mortgage-backed securities [Member]
   
Available for sale:    
Amortized Costs 5,412  
Gross Unrealized Gains 467  
Gross Unrealized Losses 0  
Fair Values 5,879  
States and political subdivisions [Member]
   
Available for sale:    
Amortized Costs 40,713  
Gross Unrealized Gains 1,960  
Gross Unrealized Losses 3  
Fair Values 42,670  
Corporate [Member]
   
Available for sale:    
Amortized Costs 20,224  
Gross Unrealized Gains 445  
Gross Unrealized Losses 37  
Fair Values 20,632  
Federal Home Loan Bank stock [Member]
   
Available for sale:    
Amortized Costs 1,596  
Gross Unrealized Gains 0  
Gross Unrealized Losses 0  
Fair Values 1,596  
Federal Reserve Bank stock [Member]
   
Available for sale:    
Amortized Costs 92  
Gross Unrealized Gains 0  
Gross Unrealized Losses 0  
Fair Values 92  
Other Securities [Member]
   
Available for sale:    
Amortized Costs 2,183  
Gross Unrealized Gains 36  
Gross Unrealized Losses 172  
Fair Values $ 2,047