Consolidated Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales	$ 208,438	$ 186,193	$ 621,376	$ 521,152
Cost of sales	124,560	113,470	374,952	316,179
Gross margin	83,878	72,723	246,424	204,973
Selling, engineering and administration	43,255	41,301	127,711	119,003
Operating earnings	40,623	31,422	118,713	85,970
Interest income, net	(2,301)	(1,200)	(5,689)	(2,649)
Other pension and postretirement costs	13	32	37	97
Earnings before income taxes	42,911	32,590	124,365	88,522
Provision for income taxes	10,873	6,621	30,140	20,645
Net earnings	$ 32,038	$ 25,969	$ 94,225	$ 67,877
Earnings per share:
Basic	$ 1.09	$ 0.89	$ 3.21	$ 2.32
Diluted	1.08	0.88	3.19	2.3
Dividends declared per common share	$ 0.34	$ 0.27	$ 0.88	$ 0.72
Shares used in computation of earnings per share:
Basic	29,369,923	29,294,886	29,351,688	29,275,445
Impact of dilutive securities	178,005	178,488	173,305	173,030
Diluted	29,547,928	29,473,374	29,524,993	29,448,475