CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 110,969	$ 168,618	$ 111,978	$ 189,880
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX
Derivative instruments net unrealized gain (loss), net of tax benefit (expense) of $(147), $(331), $56 and $(413)	446	1,007	(170)	1,259
Pension and other postretirement benefit activity, net of tax benefit (expense) of $165, $693, $(4) and $398	(501)	(2,113)	14	(1,212)
Total other comprehensive income (loss)	(55)	(1,106)	(156)	47
COMPREHENSIVE INCOME	110,914	167,512	111,822	189,927
Less: Comprehensive income attributable to noncontrolling interests	4,306	4,306	8,612	8,612
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 106,608	$ 163,206	$ 103,210	$ 181,315