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Indebtedness - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022	Nov. 01, 2021	Mar. 15, 2021
Debt Instrument [Line Items]
Total loans	$ 240,625
Less unamortized issuance costs	(11,040)	$ (12,029)
Less current maturities of long-term debt	(15,523)	(15,523)
Total long-term debt, net of current portion	214,062	222,448
Revolving loan
Debt Instrument [Line Items]
Revolving loan maximum borrowing capacity			$ 35,000	$ 200,000
Term loan
Debt Instrument [Line Items]
Total loans	$ 240,625	$ 250,000
Revolving loan maximum borrowing capacity			$ 350,000