Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Deferred tax assets:
Investment in partnerships	$ 24,496	$ 23,619
Tax receivable agreement	10,071	10,702
Net operating loss	1,216	1,557
Other	1,495	0
Total	37,278	35,878
Valuation allowance	0	0
Total deferred tax assets	37,278	35,878
Deferred tax liabilities:
Fixed assets	0	107
Intangibles	0	703
Other	0	2
Total deferred tax liabilities	0	812
Deferred tax assets, net	$ 37,278	$ 35,066