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Income Taxes - Schedule of Deferred Tax Liabilities, Current and Non-Current (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Sep. 30, 2016
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Income Tax Disclosure [Abstract] |  |
Deferred tax liabilities, non-current | $ 27,108 | $ 31,056
Total deferred tax liabilities | $ 27,108 | $ 31,056

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