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Income Taxes (Schedule of Components of Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Sep. 30, 2014
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Income Tax Disclosure [Abstract] |  |
Gross assets, current | $ 3,910 | $ 5,297
Net current deferred income tax asset | 3,910 | 5,297
Gross assets, noncurrent | 5,005 | 11,532
Gross liabilities, noncurrent | (2,717) | (110)
Net noncurrent deferred income tax asset | 2,288 | 11,422
Net deferred income tax asset | $ 6,198 | $ 16,719

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