CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 138,417	$ 124,552
Other comprehensive income (loss), net of tax
Change in unrealized holding gains (losses) on available-for-sale securities	5,778	(754)
Pension and other postretirement plans	(561)	(1,076)
Total other comprehensive income (loss), net of tax	5,217	(1,830)
Comprehensive income	$ 143,634	$ 122,722