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Intangible Assets and Goodwill (Tables)
 12 Months Ended
Dec. 31, 2022
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, 2022 and 2021, is as follows:
 20222021
(Thousands)Gross Carrying AmountAccumulated AmortizationNetGross Carrying AmountAccumulated AmortizationNet
Customer relationships$110,347 $(28,950)$81,397 $111,220 $(22,777)$88,443 
Technology44,886 (10,420)34,466 45,014 (6,917)38,097 
Licenses and other 34,300 (10,562)23,738 34,468 (7,879)26,589 
Total$189,533 $(49,932)$139,601 $190,702 $(37,573)$153,129 
Finite-lived Intangible Assets Amortization Expense
Estimated amortization expense for each of the five succeeding years is as follows:
Amortization
(Thousands)Expense
202312,473 
202412,473 
202511,851 
202610,626 
202710,471 
Schedule of Goodwill
A summary of changes in goodwill by reportable segment is as follows:
(Thousands)Performance MaterialsElectronic MaterialsPrecision OpticsTotal
Balance at December 31, 2020$1,899 $50,527 $92,490 $144,916 
Acquisition23,904 154,277 — 178,181 
Impairment charge— — — — 
Other— (284)(4,193)(4,477)
Balance at December 31, 2021$25,803 $204,520 $88,297 $318,620 
Acquisition— — 
Impairment charge— — — — 
Other354 2,150 (1,626)878 
Balance at December 31, 2022$26,157 206,670 $86,671 $319,498