Long-term Debt and Line of Credit, Principal Repayments of Long-term Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Long-term Debt, Principal Repayment [Abstract]
2023	$ 23,671
2024	25,506
2025	35,433
2026	45,014
2027	322,731
Long-term debt, gross	452,355	$ 116,534
Long-term Debt and Line of Credit [Abstract]
Debt issuance costs, capitalized loan costs	9,100	700
Debt issuance costs, accumulated amortization	1,900	800
Write off of unamortized debt issuance costs			$ (2,400)
Debt issuance costs, amortization	1,300	$ 700	$ 400
A&R Revolving Facility [Member]
Long-term Debt and Line of Credit [Abstract]
Letters of credit outstanding amount	400
A&R Credit Facility [Member]
Long-term Debt and Line of Credit [Abstract]
Write off of unamortized debt issuance costs	$ (400)