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Other Comprehensive Income (Loss) - Other Comprehensive Income Amounts Reclassified to Income Statement (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (loss) on sale of assets and other $ (264) $ 1,152 $ 1,755 $ 2,783
Income tax expense (benefit) 23,982 145,925 109,456 245,625
Net of tax 153,480 534,485 470,102 919,490
Reclassification out of Accumulated Other Comprehensive Income (Loss)        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Net of tax 319 932 (2,399) 1,659
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Hedging instruments:        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income tax expense (benefit) (74) 66 (1,113) 65
Net of tax (231) 205 (3,479) 205
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Hedging instruments: | Commodity price swap contracts        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Sales and other revenues (305) 271 (4,592) 270
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Other post-retirement benefit obligations: | Pension obligations        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (loss) on sale of assets and other (215) 45 (432) 90
Income tax expense (benefit) (61) 11 (114) 22
Net of tax (154) 34 (318) 68
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Other post-retirement benefit obligations: | Post-retirement healthcare obligations        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (loss) on sale of assets and other 935 918 1,857 1,836
Income tax expense (benefit) 228 223 451 445
Net of tax 707 695 1,406 1,391
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Other post-retirement benefit obligations: | Retirement restoration plan        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (loss) on sale of assets and other (4) (3) (10) (6)
Income tax expense (benefit) (1) (1) (2) (1)
Net of tax $ (3) $ (2) $ (8) $ (5)