CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 626,030	$ 518,781	$ 500,826
Derivative instruments:
Net unrealized gain (loss), net of tax benefit (expense) of $(292), $234, and $615	(891)	713	1,873
Pension and other postretirement benefits activity, net of tax benefit (expense) of $(1,073), $801, and $(7,078) (Note 7)	3,093	(2,422)	21,553
Total other comprehensive income (loss)	2,202	(1,709)	23,426
COMPREHENSIVE INCOME	628,232	517,072	524,252
Less: Comprehensive income attributable to noncontrolling interests	17,224	17,224	17,224
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 611,008	$ 499,848	$ 507,028