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Intangible Assets, Goodwill and Other (Tables)
9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule Of Identifiable Intangible Assets [Table Text Block]
(in thousands)
September 30, 2023December 31, 2022September 30, 2022
Intangible assets with definite lives:
Patents and purchased technology$14,198 $14,198 $14,198 
Customer relationships23,000 23,000 23,000 
Gross carrying amount37,198 37,198 37,198 
Accumulated amortization:
Patents and purchased technology(14,198)(14,198)(14,198)
Customer relationships(21,900)(20,663)(20,249)
Accumulated amortization(36,098)(34,861)(34,447)
Net carrying amount1,100 2,337 2,751 
Intangible assets with indefinite lives79,221 79,221 97,921 
Intangible assets, net$80,321 $81,558 $100,672 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
The following table presents the remaining estimated annual amortization expense of intangible assets with definite lives for the years 2023 through 2028:

(in thousands)
2023$413 
2024$687 
2025 and thereafter$—