Quarterly report [Sections 13 or 15(d)]

Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details)

v3.25.1
Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2025
Mar. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Prior service credit $ (283,517)   $ (323,041)   $ (559,667) $ (640,674)
Other income (deductions), net (1,727)   (878)   2,451 (1,758)
(Loss) income before income taxes (11,644)   7,905   (17,474) 4,876
Income taxes 2,728   1,122   5,086 1,848
Net (loss) income (8,916) $ (3,472) 9,027 $ (2,303) (12,388) 6,724
Reclassification out of Accumulated Other Comprehensive Income | Net investment hedges            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Interest expense 301   327   656 586
Post-retirement benefit plans | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
(Loss) income before income taxes 226   281   454 563
Income taxes (57)   (71)   (114) (142)
Net (loss) income 169   210   340 421
Prior service credit | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Prior service credit 89   91   180 182
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Other income (deductions), net 137   190   274 381
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
(Loss) income before income taxes 553   995   1,376 1,913
Income taxes (137)   (249)   (342) (479)
Net (loss) income 416   746   1,034 1,434
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Cash flow hedges            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Interest expense 252   $ 668   720 $ 1,327
Other | Reclassification out of Accumulated Other Comprehensive Income | Divestitures            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Other current liabilities $ 0       $ (6,844)