Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 703,592	$ 565,568	$ 505,198
Cost of sales	427,154	345,598	299,714
Gross margin	276,438	219,970	205,484
Selling, engineering and administration	158,389	132,675	126,761
Operating earnings	118,049	87,295	78,723
Interest income, net	(4,047)	(552)	(20)
Other pension and postretirement costs	130	130	120
Earnings before income taxes	121,966	87,717	78,623
Provision for income taxes	29,368	21,221	17,739
Net earnings	$ 92,598	$ 66,496	$ 60,884
Earnings per share:
Basic	$ 3.16	$ 2.28	$ 2.09
Diluted	$ 3.14	$ 2.26	$ 2.08
Shares used in computation of earnings per share:
Basic	29,284	29,218	29,144
Impact of dilutive securities	172	158	194
Diluted	29,456	29,376	29,338