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Commitments and Contingent Liabilities (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Commitments To Extend Credit [Member]
 
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 33.4
Standby Letters Of Credit [Member]
 
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 3.3