Accumulated Other Comprehensive Loss - Amount Reclassified from AOCL (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other components of net periodic benefit credit	$ (4,548)	$ (4,451)	$ (13,937)	$ (12,062)
Tax benefit	12,599	17,422	24,004	44,276
Total reclassification for the period, net of tax	(61,230)	(60,680)	(116,729)	(171,148)
Reclassification out of Accumulated Other Comprehensive Income | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other components of net periodic benefit credit	(20)	(20)	(61)	(60)
Reclassification out of Accumulated Other Comprehensive Income | Net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other components of net periodic benefit credit	234	318	703	953
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	214	298	642	893
Tax benefit	(60)	(250)	(180)	(250)
Total reclassification for the period, net of tax	$ 154	$ 48	$ 462	$ 643