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Goodwill and Other Intangible Assets (Details Textual) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Goodwill and Other Intangible Assets (Textual) [Abstract]      
Amortization expense for intangible assets $ 8.2 $ 10.3 $ 9.5