Stock-Based Compensation - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2026	Sep. 30, 2025
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 0.2	$ 0.1
Weighted average period to recognize remaining cost (in years)	2 years 7 months 6 days
Time-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Performance-Based Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Nonvested Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 14.5	$ 9.1
Weighted average period to recognize remaining cost (in years)	2 years 1 month 6 days