Variable Interest Entity - Schedule of Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Variable Interest Entity [Line Items]
Restricted cash and cash equivalents	$ 4,642	$ 3,844
Other current assets	479,840	292,036
Securitized intangible asset, net	84,998	92,202
Current maturities of securitized long-term debt	8,001	9,922
Securitized long-term debt	81,261	85,078
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Restricted cash and cash equivalents	4,642	3,844
Other current assets	14	11
Securitized intangible asset, net	84,998	92,202
Accrued interest	1,534	1,374
Current maturities of securitized long-term debt	8,001	9,922
Securitized long-term debt	$ 81,261	$ 85,078