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Common Shareholders' Equity (Cash Received and Associated Tax Benefit) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Equity [Abstract]      
Cash received $ 0 $ 262 $ 224
Tax benefits $ 0 $ 6 $ 178