Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 111,088	$ 94,798
Unrealized (losses) gains, net of tax	(38,198)	45,643
Change in pension surplus, net of tax	1,019	3,417
Total other comprehensive (loss) income	(37,179)	49,060
Total comprehensive income	$ 73,909	$ 143,858