Consolidated Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 159,101	$ 132,402
Cost of sales	96,285	81,679
Gross margin	62,816	50,723
Selling, engineering and administration	37,770	31,861
Operating earnings	25,046	18,862
Interest (income) expense, net	(622)	13
Other pension and postretirement costs	32	32
Earnings before income taxes	25,636	18,817
Provision for income taxes	6,221	4,457
Net earnings	$ 19,415	$ 14,360
Earnings per share:
Basic	$ 0.66	$ 0.49
Diluted	0.66	0.49
Dividends declared per common share	$ 0.23	$ 0.20
Shares used in computation of earnings per share:
Basic	29,255,184	29,198,888
Impact of dilutive securities	165,770	164,438
Diluted	29,420,954	29,363,326