CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - UNAUDITED - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 144,982	$ 129,585	$ 292,677	$ 258,012
Cost of goods sold	93,134	81,889	186,489	167,725
Gross margin	51,848	47,696	106,188	90,287
Selling, general and administrative expenses	22,238	20,937	44,026	39,262
Research and development expenses	6,294	6,029	12,488	11,716
Restructuring charges	630	151	942	232
Operating earnings	22,686	20,579	48,732	39,077
Other (expense) income:
Interest expense	(602)	(508)	(1,148)	(1,063)
Interest income	263	257	443	459
Other expense, net	(5,425)	(20,929)	(5,359)	(24,285)
Total other expense, net	(5,764)	(21,180)	(6,064)	(24,889)
Earnings (loss) before income taxes	16,922	(601)	42,668	14,188
Income tax expense (benefit)	4,324	(1,476)	9,831	1,323
Net earnings	$ 12,598	$ 875	$ 32,837	$ 12,865
Earnings per share:
Basic	$ 0.39	$ 0.03	$ 1.02	$ 0.40
Diluted	$ 0.39	$ 0.03	$ 1.02	$ 0.39
Basic weighted – average common shares outstanding:	32,039	32,397	32,096	32,358
Effect of dilutive securities	204	229	218	259
Diluted weighted – average common shares outstanding:	32,243	32,626	32,314	32,617
Cash dividends declared per share	$ 0.04	$ 0.04	$ 0.08	$ 0.08