Consolidated Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Net sales	$ 196,280	$ 159,101
Cost of sales	119,102	96,285
Gross margin	77,178	62,816
Selling, engineering and administration	40,600	37,770
Operating earnings	36,578	25,046
Interest income, net	(1,526)	(622)
Other pension and postretirement costs	12	32
Earnings before income taxes	38,092	25,636
Provision for income taxes	8,961	6,221
Net earnings	$ 29,131	$ 19,415
Earnings per share:
Basic	$ 0.99	$ 0.66
Diluted	0.99	0.66
Dividends declared per common share	$ 0.27	$ 0.23
Shares used in computation of earnings per share:
Basic	29,320,483	29,255,184
Impact of dilutive securities	174,005	165,770
Diluted	29,494,488	29,420,954