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Mortgage Servicing Rights Mortgage Servicing Rights Narrative (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Sep. 30, 2010
Dec. 31, 2012
Mortgage Banking [Abstract]        
Prepayment speed 17.08%      
Average quarterly discount rate 10 years      
Discount rate adjustment rate 4.79%      
Origination of Mortgage Servicing Rights (MSRs) $ 255 $ 11    
Amortization of Mortgage Servicing Rights (MSRs) 136   172  
Mortgage servicing rights 1,702 994   1,228
Residential mortgage loans serviced for others, principal $ 208,683 $ 221,694   $ 205,859