Debt (Deferred Financing Fees Narrative ) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Schedule of debt deferred financing costs and discounts [Line Items]
Write off of deferred debt issuance cost	$ 0	$ 1,333	$ 1,795
Amortization of debt issuance costs and discounts	$ 1,866	1,946	$ 1,735
Securitization Facility, due April 1, 2024
Schedule of debt deferred financing costs and discounts [Line Items]
Debt fees		822
Equipment Financings
Schedule of debt deferred financing costs and discounts [Line Items]
Debt fees		453
2014 Term Loan
Schedule of debt deferred financing costs and discounts [Line Items]
Write off of deferred debt issuance cost		1,333
Financing fees		4,985
Deferred financing fees		1,931
Debt fees expense		$ 3,054