Consolidated Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 132,402	$ 117,842
Cost of sales	81,679	68,480
Gross margin	50,723	49,362
Selling, engineering and administration	31,861	31,615
Operating earnings	18,862	17,747
Interest expense, net	13	7
Other pension and postretirement costs	32	31
Earnings before income taxes	18,817	17,709
Provision for income taxes	4,457	3,928
Net earnings	$ 14,360	$ 13,781
Earnings per share:
Basic	$ 0.49	$ 0.47
Diluted	0.49	0.47
Dividends declared per common share	$ 0.20	$ 0.18
Shares used in computation of earnings per share:
Basic	29,198,888	29,098,490
Impact of dilutive securities	164,438	218,098
Diluted	29,363,326	29,316,588