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 earnings	$ 29,782	$ 22,731	$ 58,712	$ 46,142
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(6,951)	1,524	(9,793)	(4,619)
Unrealized gain on cash flow hedge	850	351	2,423	863
Change in postretirement benefit plans	(34)	8	(61)	15
Other comprehensive income (loss)	(6,135)	1,883	(7,431)	(3,741)
Comprehensive income	$ 23,647	$ 24,614	$ 51,281	$ 42,401