Consolidated Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net sales	$ 175,858	$ 137,833	$ 334,959	$ 270,235
Cost of sales	106,424	83,073	202,709	164,752
Gross margin	69,434	54,760	132,250	105,483
Selling, engineering and administration	39,932	32,672	77,702	64,533
Operating earnings	29,502	22,088	54,548	40,950
Interest (income) expense, net	(827)	9	(1,449)	22
Other pension and postretirement costs	33	33	65	65
Earnings before income taxes	30,296	22,046	55,932	40,863
Provision for income taxes	7,803	5,382	14,024	9,839
Net earnings	$ 22,493	$ 16,664	$ 41,908	$ 31,024
Earnings per share:
Basic	$ 0.77	$ 0.57	$ 1.43	$ 1.06
Diluted	0.76	0.57	1.42	1.06
Dividends declared per common share	$ 0.23	$ 0.2	$ 0.45	$ 0.4
Shares used in computation of earnings per share:
Basic	29,272,693	29,210,444	29,264,166	29,204,535
Impact of dilutive securities	174,832	133,907	170,301	149,173
Diluted	29,447,525	29,344,351	29,434,467	29,353,708