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Employee Benefit Plans (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2020
Retirement Benefits [Abstract] |  |  |
Defined Contribution Plan, Cost | $ 706 | $ 385 |
Liability, Defined Benefit Plan | $ 720 |  | $ 719

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