Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net earnings	$ 22,493	$ 16,664	$ 41,908	$ 31,024
Other comprehensive loss:
Foreign currency translation adjustments	88	(5,365)	1,845	(7,680)
Pension and postretirement benefits, net of tax	(33)		(65)
Comprehensive income	$ 22,548	$ 11,299	$ 43,688	$ 23,344