Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.2
Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Jun. 30, 2023
Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Prior service credit $ (333,603)     $ (300,854)     $ (973,870) $ (928,255)
Other income (deductions), net (2,487)     (389)     (3,038) (30,864)
Income (loss) before income taxes 8,113     3,915     25,579 (21,182)
Income taxes 558     (1,040)     (4,136) 2,311
Net income (loss) 8,671 $ 9,125 $ 3,647 2,875 $ (1,936) $ (19,810) 21,443 (18,871)
Reclassification out of Accumulated Other Comprehensive Income | Net investment hedges                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Interest income (expense) 284     428     866 1,213
Post-retirement benefit plans | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Income (loss) before income taxes 274     69     (445) (30,878)
Income taxes (69)     (17)     112 7,565
Net income (loss) 205     52     (333) (23,313)
Prior service credit | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Prior service credit 92     157     274 358
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Other income (deductions), net 182     (88)     552 (380)
Settlement loss | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Other income (deductions), net 0     0     (1,271) (30,856)
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 601     (42)     2,880 (793)
Income taxes (151)     12     (728) 196
Net income (loss) 450     (30)     2,152 (597)
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Cash flow hedges                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Interest income (expense) $ 317     $ (470)     $ 2,014 $ (2,006)