Annual report pursuant to Section 13 and 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME - Reclassifications out of AOCI (Details)

v3.23.3
ACCUMULATED OTHER COMPREHENSIVE INCOME - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Cost of goods and services sold $ (1,303,224) $ (1,240,125) $ (1,129,198)
Other income (deductions), net (2,559) (32,557) (4,117)
Income (loss) before income taxes 40,910 (104,219) 9,233
Income tax (provision) benefit (1,774) 4,391 (6,375)
Net income (loss) 39,136 (99,828) 2,858
Interest expense (44,648) (27,725) (28,684)
Postretirement Benefit Plans | Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income (loss) before income taxes (135) (30,809) (9,539)
Income tax (provision) benefit 33 7,548 2,337
Net income (loss) (102) (23,261) (7,202)
Prior service (cost) credit | Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Cost of goods and services sold 364 516 491
Actuarial gains (losses) | Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income (deductions), net 772 (469) (9,769)
Prior service cost write-off | Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income (deductions), net 0 0 (261)
Settlement losses | Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income (deductions), net (1,271) (30,856) 0
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income (loss) before income taxes 3,785 (141) (3,186)
Income tax (provision) benefit (959) 36 781
Net income (loss) 2,826 (105) (2,405)
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Interest Rate Swaps      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Interest expense 2,626 (1,786) (3,249)
Net investment hedge | Reclassification out of Accumulated Other Comprehensive Income | Cross-Currency Swaps      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Interest expense $ 1,159 $ 1,645 $ 63