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Income Taxes - Narrative (Details) - USD ($)
6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Jul. 04, 2025
Income Tax Contingency [Line Items]      
Effective tax rate 29.20% 19.00%  
Effective tax rate statutory federal rate 21.00%    
Percentage of bonus depreciation for acquired property placed in service     100.00%
Unrecognized tax benefits $ 0    
One Big Beautiful Bill Act      
Income Tax Contingency [Line Items]      
Amortization period for acquired property     5 years