Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 12,582	$ 8,961
Reclassification of pension and postretirement adjustments into earnings, net of $35 and $43 tax benefit in the three months ended March 31, 2022 and March 31, 2021, respectively.	118	143
Total other comprehensive income	118	143
Comprehensive income	$ 12,700	$ 9,104