Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Sep. 30, 2025
Operating Loss Carryforwards [Line Items]
Effective income tax rate reconciliation (in percent)	(74.90%)	28.30%	27.60%	27.90%
Tax receivable agreement liability	$ 37.5		$ 37.5		$ 37.5
Percentage of net cash savings			85.00%
Deferred Tax Assets, Operating Loss Carryforwards, Domestic					6.7
Tax Credit Carryforward, Amount					9.7
Domestic Tax Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					32.0
Deferred Tax Asset, Interest Carryforward					2.4
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					1.4
Deferred Tax Asset, Interest Carryforward					$ 0.2