Accumulated Other Comprehensive Loss - Amount Reclassified from AOCL (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other components of net periodic benefit credit	$ (4,800)	$ (3,273)
Tax benefit	(2,738)	(16,859)
Net income	13,202	69,690
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)
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	317
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	214	297
Tax benefit	(60)	0
Net income	$ 154	$ 297