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Significant Accounting Policies and Practices and Recent Accounting Pronouncements - Income Taxes (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Accounting Policies [Abstract] |  |  |
Gain on contingent purchase price reduction | $ 0.5 | $ 0 | $ 41.0
Recognized income tax positions | 50.00% |  |

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- Details
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