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Stock Compensation Plans: Summary of MRDP Shares Vested (Details) (MRDP, Stock Grants, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
MRDP | Stock Grants
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vested 3,254 6,207 10,831
Aggregate vesting date fair value $ 30,000 $ 38,000 $ 46,000