CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - 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	$ 251,970	$ 234,906	$ 500,236	$ 464,171
Cost of sales	165,452	145,073	328,324	284,839
Gross margin	86,518	89,833	171,912	179,332
Selling, general and administrative expenses	56,138	44,959	113,843	87,372
Research and development expenses	8,050	7,492	16,310	14,664
Restructuring and impairment charges	677	747	746	2,253
Other operating (income) expense, net	(1,743)	890	(2,274)	2,105
Operating income	23,396	35,745	43,287	72,938
Equity income in unconsolidated joint ventures	1,800	1,930	3,075	4,111
Other income (expense), net	319	1,239	586	4,207
Interest expense, net	(1,548)	(404)	(2,617)	(1,011)
Income before income tax expense	23,967	38,510	44,331	80,245
Income tax expense	6,084	9,855	9,848	20,372
Net income	$ 17,883	$ 28,655	$ 34,483	$ 59,873
Basic earnings per share (in dollars per share)	$ 0.95	$ 1.53	$ 1.83	$ 3.20
Diluted earnings per share (in dollars per share)	$ 0.94	$ 1.52	$ 1.82	$ 3.18
Shares used in computing:
Basic earnings per share (in shares)	18,813	18,729	18,797	18,721
Diluted earnings per share (in shares)	18,992	18,846	18,996	18,810