Accumulated Other Comprehensive Loss - Amount Reclassified from AOCL (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other components of net periodic benefit credit	$ (4,589)	$ (4,338)	$ (9,389)	$ (7,611)
Tax benefit	8,667	9,995	11,405	26,854
Total reclassification for the period, net of tax	(42,168)	(40,551)	(55,499)	(110,468)
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	(21)	(20)	(41)	(40)
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	235	318	469	635
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	428	595
Tax benefit	(60)	0	(120)	0
Total reclassification for the period, net of tax	$ 154	$ 298	$ 308	$ 595