Segment Reporting and Geographic Information - Disaggregation of Revenue by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,510,644	$ 1,176,274	$ 1,185,424
Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	694,138	531,635
Industrial
Disaggregation of Revenue [Line Items]
Net sales	201,141	147,032
Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	115,177	92,953
Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	75,363	70,028
Automotive
Disaggregation of Revenue [Line Items]
Net sales	121,143	76,283
Energy
Disaggregation of Revenue [Line Items]
Net sales	123,243	96,355
Telecom and Data Center
Disaggregation of Revenue [Line Items]
Net sales	53,683	46,496
Other
Disaggregation of Revenue [Line Items]
Net sales	126,756	115,492
Performance Alloys and Composites
Disaggregation of Revenue [Line Items]
Net sales	511,874	394,195
Performance Alloys and Composites | Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	8,481	4,626
Performance Alloys and Composites | Industrial
Disaggregation of Revenue [Line Items]
Net sales	123,337	90,884
Performance Alloys and Composites | Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	86,046	67,173
Performance Alloys and Composites | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	41,694	47,983
Performance Alloys and Composites | Automotive
Disaggregation of Revenue [Line Items]
Net sales	105,466	66,489
Performance Alloys and Composites | Energy
Disaggregation of Revenue [Line Items]
Net sales	23,913	20,587
Performance Alloys and Composites | Telecom and Data Center
Disaggregation of Revenue [Line Items]
Net sales	53,510	44,313
Performance Alloys and Composites | Other
Disaggregation of Revenue [Line Items]
Net sales	69,427	52,140
Advanced Materials
Disaggregation of Revenue [Line Items]
Net sales	866,816	670,867
Advanced Materials | Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	683,085	526,553
Advanced Materials | Industrial
Disaggregation of Revenue [Line Items]
Net sales	45,025	38,052
Advanced Materials | Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	5,509	6,241
Advanced Materials | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	1,184	479
Advanced Materials | Automotive
Disaggregation of Revenue [Line Items]
Net sales	7,321	6,262
Advanced Materials | Energy
Disaggregation of Revenue [Line Items]
Net sales	99,330	75,768
Advanced Materials | Telecom and Data Center
Disaggregation of Revenue [Line Items]
Net sales	173	2,183
Advanced Materials | Other
Disaggregation of Revenue [Line Items]
Net sales	25,189	15,329
Precision Optics
Disaggregation of Revenue [Line Items]
Net sales	131,954	111,212
Precision Optics | Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	2,572	456
Precision Optics | Industrial
Disaggregation of Revenue [Line Items]
Net sales	32,779	18,096
Precision Optics | Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	23,622	19,539
Precision Optics | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	32,485	21,566
Precision Optics | Automotive
Disaggregation of Revenue [Line Items]
Net sales	8,356	3,532
Precision Optics | Energy
Disaggregation of Revenue [Line Items]
Net sales	0	0
Precision Optics | Telecom and Data Center
Disaggregation of Revenue [Line Items]
Net sales	0	0
Precision Optics | Other
Disaggregation of Revenue [Line Items]
Net sales	32,140	48,023
Other
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Semiconductor
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Industrial
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Consumer Electronics
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Automotive
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Energy
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Telecom and Data Center
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Other
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0