Consolidated Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales	$ 186,193	$ 148,009	$ 521,152	$ 418,244
Cost of sales	113,470	90,487	316,179	255,239
Gross margin	72,723	57,522	204,973	163,005
Selling, engineering and administration	41,301	33,651	119,003	98,184
Operating earnings	31,422	23,871	85,970	64,821
Interest income, net	(1,200)	(108)	(2,649)	(86)
Other pension and postretirement costs	32	32	97	97
Earnings before income taxes	32,590	23,947	88,522	64,810
Provision for income taxes	6,621	6,014	20,645	15,853
Net earnings	$ 25,969	$ 17,933	$ 67,877	$ 48,957
Earnings per share:
Basic	$ 0.89	$ 0.61	$ 2.32	$ 1.68
Diluted	0.88	0.61	2.3	1.67
Dividends declared per common share	$ 0.27	$ 0.23	$ 0.72	$ 0.63
Shares used in computation of earnings per share:
Basic	29,294,886	29,215,982	29,275,445	29,211,488
Impact of dilutive securities	178,488	156,482	173,030	151,609
Diluted	29,473,374	29,372,464	29,448,475	29,363,097