Significant Accounting Policies (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
Mar. 31, 2012
Significant Accounting Policies (Textual) [Abstract]
Ownership interests in certain subsidiaries under equity method investment	50 percent or less
Decrease in income tax expense	$ 5.5

Ownership interests in certain subsidiaries under equity method investment.

No definition available.

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