Variable Interest Entity - Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Variable Interest Entity [Line Items]
Restricted cash and cash equivalents	$ 3,844	$ 0
Other current assets	292,036	2,274,490
Securitized intangible asset, net	92,202	0
Accrued interest	78,939	59,542
Current maturities of securitized long-term debt	9,922	0
Securitized long-term debt	85,078	$ 0
Variable Interest Entity, Primary Beneficiary | AEK
Variable Interest Entity [Line Items]
Restricted cash and cash equivalents	3,844
Other current assets	11
Securitized intangible asset, net	92,202
Accrued interest	1,374
Current maturities of securitized long-term debt	9,922
Securitized long-term debt	$ 85,078