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Stock Compensation Plans: Summary of MRDP Shares Unvested (Details) (MRDP, Stock Grants, USD $)
In Thousands, except Per Share data, 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, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Unvested shares, beginning of period 3,254    
Shares vested 3,254 6,207 10,831
Unvested shares, end of period 0 3,254  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Unvested shares, beginning of period, Weighted Average Grant Date Fair Value $ 7.01    
Shares vested, Weighted Average Grant Date Fair Value $ 7.01    
Unvested shares, end of period, Weighted Average Grant Date Fair Value $ 0.00 $ 7.01