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Fair Value (Details 5) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Impaired loans- commercial mortgages [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Fair value $ 8,327
Impaired loans- commercial mortgages [Member] | Maximum [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 65.00%
Impaired loans- commercial mortgages [Member] | Minimum [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 0.00%
Impaired loans- commercial mortgages [Member] | Weighted Average [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 17.00%
Impaired loans- commercial, industrial, and agricultural [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Fair value 3,945
Impaired loans- commercial, industrial, and agricultural [Member] | Maximum [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 65.00%
Impaired loans- commercial, industrial, and agricultural [Member] | Minimum [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 14.00%
Impaired loans- commercial, industrial, and agricultural [Member] | Weighted Average [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 21.00%
Impaired loans- residential real estate [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Fair value $ 419
Impaired loans- residential real estate [Member] | Maximum [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 15.00%
Impaired loans- residential real estate [Member] | Minimum [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 10.00%
Impaired loans- residential real estate [Member] | Weighted Average [Member]
  
Quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2012  
Input Utilized 11.00%