Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	$ (8,455)	$ (3,958)
Net gain reclassified into earnings	(298,902)	(295,381)
Tax provision	60,153	56,140
Net of tax	(238,433)	(230,821)
Reclassification out of Accumulated Other Comprehensive Income | Pension plans:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain reclassified into earnings	(570)	(603)
Tax provision	122	132
Net of tax	(448)	(471)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of actuarial gain
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	(506)	(408)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service credits
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net	(64)	(195)
Reclassification out of Accumulated Other Comprehensive Income | Cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain reclassified into earnings	(263)	(479)
Tax provision	61	78
Net of tax	$ (202)	$ (401)