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Employee Benefit Plans (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2020
Retirement Benefits [Abstract] |  |  |  |
Defined Contribution Plan, Cost | $ 3,386 | $ 2,326 | $ 2,144 |
Defined Benefit Plan, Funded Percentage |  |  |  | 84.38%

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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