Intangible Assets and Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 27, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 79,011	$ 144,916	$ 79,011
Goodwill, acquired during period		178,181	70,577
Goodwill impairment charges	(9,100)	0	(9,053)	$ (11,560)
Goodwill, other increase (decrease)		(4,477)	4,381
Goodwill, ending balance		318,620	144,916	79,011
Performance Alloys and Composites
Goodwill [Roll Forward]
Goodwill, beginning balance	1,899	1,899	1,899
Goodwill, acquired during period		23,904	0
Goodwill impairment charges		0	0
Goodwill, other increase (decrease)		0	0
Goodwill, ending balance		25,803	1,899	1,899
Advanced Materials
Goodwill [Roll Forward]
Goodwill, beginning balance	50,190	50,527	50,190
Goodwill, acquired during period		154,277	0
Goodwill impairment charges		0	0
Goodwill, other increase (decrease)		(284)	337
Goodwill, ending balance		204,520	50,527	50,190
Precision Optics
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 26,922	92,490	26,922
Goodwill, acquired during period		0	70,577
Goodwill impairment charges		0	(9,053)
Goodwill, other increase (decrease)		(4,193)	4,044
Goodwill, ending balance		$ 88,297	$ 92,490	$ 26,922