Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 28,930	$ 23,411
Other comprehensive loss, net of tax:
Foreign currency translation adjustment	(2,842)	(6,143)
Unrealized gain on cash flow hedge	1,573	512
Change in postretirement benefit plans	(27)	7
Other comprehensive loss	(1,296)	(5,624)
Comprehensive income	$ 27,634	$ 17,787