Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.1
Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2023
Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Prior service credit $ (329,957)   $ (320,459)   $ (640,267) $ (627,401)
Other income (deductions), net 1,503   235   (551) (30,475)
Income (loss) before income taxes 12,507   1,341   17,466 (25,097)
Income taxes (3,382)   (3,277)   (4,694) 3,351
Net income (loss) 9,125 $ 3,647 (1,936) $ (19,810) 12,772 (21,746)
Reclassification out of Accumulated Other Comprehensive Income | Net investment hedges            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Interest income (expense) 309   420   581 785
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   66   (719) (30,947)
Income taxes (69)   (16)   182 7,582
Net income (loss) 205   50   (537) (23,365)
Prior service credit | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Prior service credit 91   157   182 201
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Other income (deductions), net 183   (91)   370 (292)
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 1,341   (315)   2,278 (751)
Income taxes (339)   78   (576) 184
Net income (loss) 1,002   (237)   1,702 (567)
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) $ 1,032   $ (735)   $ 1,697 $ (1,536)