Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 799,023	$ 703,644	$ 643,705
Cost of sales	555,849	479,747	432,338
Gross margin	243,174	223,897	211,367
Operating expenses:
Selling expenses	60,413	58,630	60,932
Research and development expenses	13,524	10,332	11,377
General and administrative expenses	41,735	43,788	36,505
Total operating expenses	115,672	112,750	108,814
Earnings from operations	127,502	111,147	102,553
Other expenses:
Interest expense, net	2,456	4,439	5,959
Other, net	(187)	291	116
Total other expenses	2,269	4,730	6,075
Earnings before income tax expense	125,233	106,417	96,478
Income tax expense	29,129	21,794	16,807
Net earnings	$ 96,104	$ 84,623	$ 79,671
Basic net earnings per common share (in dollars per share)	$ 2.98	$ 2.63	$ 2.48
Diluted net earnings per common share (in dollars per share)	$ 2.94	$ 2.60	$ 2.45