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Employee Benefit Plans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Sep. 30, 2018
Employee Benefit Plans [Abstract] |  |  |  |  |
401 (k) Matching Expenses | $ 600 | $ 485 | $ 1,023 | $ 914 |
Unfunded Benefit Liability | $ 718 |  | $ 718 |  | $ 755

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