Condensed Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 228,867	$ 185,656
Cost of sales	157,361	126,929
Gross margin	71,506	58,727
Operating expenses:
Selling expenses	16,985	14,924
Research and development expenses	3,231	2,749
General and administrative expenses	12,954	10,479
Total operating expenses	33,170	28,152
Earnings from operations	38,336	30,575
Other expenses:
Interest expense, net	545	725
Other expense (income), net	161	(133)
Total other expenses	706	592
Earnings before income tax expense	37,630	29,983
Income tax expense	8,700	6,572
Net earnings	$ 28,930	$ 23,411
Net earnings per common share - basic (in dollars per share)	$ 0.90	$ 0.73
Net earnings per common share - diluted (in dollars per share)	$ 0.89	$ 0.72