Quarterly report [Sections 13 or 15(d)]

Debt and Financing Arrangements - Long-Term Debt (Details)

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Debt and Financing Arrangements - Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Sep. 30, 2024
Debt Instrument [Line Items]    
Total debt $ 822,180 $ 776,467
Finance lease obligations $ 21,577 $ 22,103
Finance lease, liability, statement of financial position [extensible enumeration] Long-term debt Long-term debt
Less current maturities $ (6,357) $ (6,853)
Long-term debt 815,823 769,614
2027 Senior Secured Notes    
Debt Instrument [Line Items]    
Total debt 295,196 294,751
Other borrowings    
Debt Instrument [Line Items]    
Total debt 6,495 15,602
Revolving credit facilities | Line of Credit    
Debt Instrument [Line Items]    
Total debt $ 498,912 $ 444,011