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Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Estimated Fair Value, Due in one year or less $ 452  
Estimated Fair Value, Due from one to five years 16,582  
Estimated Fair Value, Due from five to ten years 36,756  
Estimated Fair Value, Due over ten years 33,651  
Total 190,462 187,475
Tax Equivalent Yield, Due in one year or less 6.76%  
Tax Equivalent Yield, Due from one to five years 2.70%  
Tax Equivalent Yield, Due from five to ten years 4.39%  
Tax Equivalent Yield, Due over ten years 4.67%  
Total 3.44%  
Collateralized Mortgage Backed Securities [Member]
    
Total $ 103,021 $ 99,914
Total 2.80%