Annual report pursuant to Section 13 and 15(d)

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

v3.21.2
ACCUMULATED OTHER COMPREHENSIVE INCOME - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Cost of goods and services sold $ (1,129,198) $ (1,000,537) $ (994,810)
Other income (deductions), net (6,762) (9,221) (8,918)
Income (loss) before income taxes 9,233    
Income tax (provision) benefit (6,375) 18,685 (806)
Net income (loss) 2,858 (87,652) (38,889)
Interest expense (28,684) (34,885) (40,962)
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 (9,539) (9,117) (3,864)
Income tax (provision) benefit 2,337 2,234 947
Net income (loss) (7,202) (6,883) (2,917)
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 491 650 381
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income (deductions), net (9,769) (9,767) (4,245)
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 (261) 0 0
Derivatives | Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Income (loss) before income taxes (3,249) (861) 3,181
Income tax (provision) benefit 796 211 (779)
Net income (loss) (2,453) (650) 2,402
Interest expense $ (3,249) $ (861) $ 3,181