Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

The cost and accumulated amortization of intangible assets subject to amortization as of December 31, 2021 and 2020, is as follows:

	2021						2020
(Thousands)	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Customer relationships	$	111,220	$	(22,777)	$	88,443	$	81,231	$	(38,773)	$	42,458
Technology	45,614		(7,517)		38,097		16,915		(13,290)		3,625
Licenses and other	33,868		(7,279)		26,589		11,457		(4,840)		6,617
Total	$	190,702	$	(37,573)	$	153,129	$	109,603	$	(56,903)	$	52,700

Finite-lived Intangible Assets Amortization Expense

Estimated amortization expense for each of the five succeeding years is as follows:

	Amortization
(Thousands)	Expense
2022	13,159
2023	12,520
2024	12,427
2025	11,794
2026	10,515

Schedule of Goodwill

A summary of changes in goodwill by reportable segment is as follows:

(Thousands)	Performance Alloys and Composites		Advanced Materials		Precision Optics		Total
Balance at December 31, 2019	$	1,899	$	50,190	$	26,922	$	79,011
Acquisition	—		—		70,577		70,577
Impairment charge	—		—		(9,053)		(9,053)
Other	—		337		4,044		4,381
Balance at December 31, 2020	$	1,899	$	50,527	$	92,490	$	144,916
Acquisition	23,904		154,277		—		178,181
Impairment charge	—		—		—		—
Other	—		(284)		(4,193)		(4,477)
Balance at December 31, 2021	$	25,803	204,520		$	88,297	$	318,620