Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 37,180	$ 6,505	$ 49,762	$ 15,466
Reclassification of pension and postretirement adjustments into earnings, net of $32 and $67 tax benefit in the three and six months ended June 30, 2022, respectively, and net of $42 and $85 tax benefit in the three and six months ended June 30, 2021, respectively.	118	143	236	286
Total other comprehensive income	118	143	236	286
Comprehensive income	$ 37,298	$ 6,648	$ 49,998	$ 15,752