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Income Taxes (Details) - USD ($) $ in Thousands | 9 Months Ended |
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Jun. 30, 2018 | Sep. 30, 2017
Income Tax Disclosure [Abstract] |  |
Net discrete tax provision as result of 2017 Tax Act | $ 3,400 |
Deferred tax asset, net, long-term | $ 4,875 | $ 9,639

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