CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - 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	$ 229,148	$ 247,231	$ 703,816	$ 747,467
Cost of sales	148,788	169,167	464,138	497,491
Gross margin	80,360	78,064	239,678	249,976
Selling, general and administrative expenses	44,336	50,653	150,549	164,496
Research and development expenses	7,827	9,140	25,511	25,450
Restructuring and impairment charges	1,921	373	16,361	1,119
Other operating (income) expense, net	(846)	(578)	(7,507)	(2,852)
Operating income	27,122	18,476	54,764	61,763
Equity income in unconsolidated joint ventures	641	1,162	1,559	4,237
Other income (expense), net	761	977	9	1,563
Interest expense, net	(2,328)	(2,942)	(8,627)	(5,559)
Income before income taxes	26,196	17,673	47,705	62,004
Income tax expense (benefit)	7,161	2,835	14,311	12,683
Net income	$ 19,035	$ 14,838	$ 33,394	$ 49,321
Basic earnings per share (in dollars per share)	$ 1.02	$ 0.79	$ 1.79	$ 2.62
Diluted earnings per share (in dollars per share)	$ 1.02	$ 0.78	$ 1.79	$ 2.60
Shares used in computing:
Basic earnings per share (in shares)	18,627	18,818	18,619	18,804
Diluted earnings per share (in shares)	18,685	18,999	18,668	18,997