CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 91,688	$ 97,937	$ 380,901	$ 424,332
Other comprehensive loss, net of tax:
Net change in unrealized gains/(losses) on cash flow hedges	(4,277)	(968)	(4,702)	(1,725)
Defined benefit pension and other postretirement benefit plans:
Net change in unrecognized prior service costs	(467)	49	(457)	(11)
Net change in unrecognized actuarial losses	(3,063)	323	(3,001)	(69)
Other comprehensive loss, net of tax	(7,807)	(596)	(8,160)	(1,805)
Comprehensive income	$ 83,881	$ 97,341	$ 372,741	$ 422,527