Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 13,678	$ 22,306	$ 13,373	$ 38,566
Other comprehensive income (loss), net of tax:
Pension and other postretirement employee benefits	(230)	(344)	(459)	(475)
Cash flow hedges	3,611	17,719	19,536	384
Other comprehensive income (loss), net of tax	3,381	17,375	19,077	(91)
Comprehensive income	$ 17,059	$ 39,681	$ 32,450	$ 38,475