Quarterly report [Sections 13 or 15(d)]

Debt and Financing Arrangements - Summary of Receivables Sold (Details)

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Debt and Financing Arrangements - Summary of Receivables Sold (Details) - Receivables Purchase Agreement - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Transfer of Financial Assets Accounted for as Sales [Line Items]    
Gross receivables sold $ 121,229 $ 231,588
Cash collections reinvested (134,729) (242,288)
Net cash reinvested $ (13,500) $ (10,700)