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Financial Instruments With Off-Balance-Sheet Risk (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Standby Letters of Credit [Member]
   
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fair value off balance sheet risks $ 1,653 $ 2,574
Commitments to Extend Credit [Member]
   
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fair value off balance sheet risks $ 60,545 $ 51,153