Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 29,851	$ 25,188	$ 35,815
Cumulative translation adjustments	(2,807)	3,111	88
Pension and postretirement medical liability adjustments, net of tax	2,854	(4,951)	(5,202)
Other comprehensive income (loss)	47	(1,840)	(5,114)
Comprehensive income	$ 29,898	$ 23,348	$ 30,701