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Derivative and Other Financial Instruments with Off-Balance Sheet Risks: Off-Balance-Sheet Credit Exposure, Policy (Details) (Loans Held for Investment and Loans Held for Sale [Member], USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Jun. 30, 2012
Loans Held for Investment and Loans Held for Sale [Member]
   
Derivative [Line Items]    
Commitments to Extend Credit $ 213.8 $ 222.1