Annual report [Section 13 and 15(d), not S-K Item 405]

DEBT AND FINANCING ARRANGEMENTS - Long-Term Debt (Details)

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DEBT AND FINANCING ARRANGEMENTS - Long-Term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Sep. 30, 2024
Debt Instrument [Line Items]    
Total debt $ 710,832 $ 776,467
Finance lease obligations $ 22,564 $ 22,103
Finance lease, liability, statement of financial position [extensible enumeration] Long-term debt Long-term debt
Less current maturities $ (7,230) $ (6,853)
Long-term debt 703,602 769,614
2027 Senior Secured Notes    
Debt Instrument [Line Items]    
Total debt 296,110 294,751
Other borrowings    
Debt Instrument [Line Items]    
Total debt 7,151 15,602
Revolving credit facilities | Line of Credit    
Debt Instrument [Line Items]    
Total debt $ 385,007 $ 444,011