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Summary of Significant Accounting Policies (Foreign Currency Transactions and Translation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Foreign Currency Transaction Loss, before Tax	$ 0.1	$ 0.2	$ 0.4

Aggregate realized and unrealized loss on foreign currency transactions included in net income. Includes loss on a foreign currency forward exchange contract. Does not include foreign currency transactions designated as hedges of net investment in a foreign entity or intercompany foreign currency transactions that are of a long-term nature. Gross of tax effect.

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