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Employee Benefit Plans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2018
Retirement Benefits [Abstract] |  |  |  |  |
Defined Contribution Plan, Cost | $ 538 | $ 466 | $ 1,561 | $ 1,380 |
Liability, Defined Benefit Plan | $ 710 |  | $ 710 |  | $ 755

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