CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - UNAUDITED - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales	$ 134,552	$ 151,911	$ 425,728	$ 444,588
Cost of goods sold	88,151	98,565	276,933	285,054
Gross margin	46,401	53,346	148,795	159,534
Selling, general and administrative expenses	18,666	24,003	64,339	68,029
Research and development expenses	6,321	6,207	19,628	18,695
Restructuring charges	3,226	492	6,033	1,434
Operating earnings	18,188	22,644	58,795	71,376
Other income (expense):
Interest expense	(997)	(342)	(2,509)	(1,490)
Interest income	952	167	3,087	610
Other income (expense), net	594	(5,171)	(1,847)	(10,530)
Total other income (expense), net	549	(5,346)	(1,269)	(11,410)
Earnings before income taxes	18,737	17,298	57,526	59,966
Income tax expense	4,766	5,500	12,314	15,331
Net earnings	$ 13,971	$ 11,798	$ 45,212	$ 44,635
Earnings per share:
Basic	$ 0.45	$ 0.37	$ 1.44	$ 1.39
Diluted	$ 0.44	$ 0.37	$ 1.43	$ 1.38
Basic weighted – average common shares outstanding:	31,302	31,865	31,474	32,018
Effect of dilutive securities	209	225	216	220
Diluted weighted – average common shares outstanding:	31,511	32,090	31,690	32,238
Cash dividends declared per share	$ 0.04	$ 0.04	$ 0.12	$ 0.12