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Income Taxes (Schedule of Components of Deferred Income Tax Assets) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Sep. 30, 2015
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Income Tax Disclosure [Abstract] |  |
Gross assets, current | $ 4,384 | $ 3,910
Gross liabilities, current | (378) |
Net current deferred income tax asset | 4,006 | 3,910
Gross assets, noncurrent | 16,170 | 5,005
Gross liabilities, noncurrent | (16,308) | (2,717)
Net noncurrent deferred income tax asset (liability) | (138) | 2,288
Net deferred income tax asset | $ 3,868 | $ 6,198

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