CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 518,781	$ 500,826	$ 635,944
Derivative instruments:
Net unrealized gain, net of tax expense of $234, $615, and $360	713	1,873	1,095
Pension and other postretirement benefits activity, net of tax benefit (expense) of $801, $(7,078), and $(2,256) (Note 7)	(2,422)	21,553	6,840
Total other comprehensive income (loss)	(1,709)	23,426	7,935
COMPREHENSIVE INCOME	517,072	524,252	643,879
Less: Comprehensive income attributable to noncontrolling interests	17,224	17,224	17,224
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 499,848	$ 507,028	$ 626,655