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Intangible Assets, Goodwill and Other (Tables)
 9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule Of Identifiable Intangible Assets [Table Text Block]
(in thousands)
September 30, 2024December 31, 2023September 30, 2023
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(23,000)(22,313)(21,900)
Accumulated amortization(37,198)(36,511)(36,098)
Net carrying amount— 687 1,100 
Intangible assets with indefinite lives79,221 79,221 79,221 
Intangible assets, net$79,221 $79,908 $80,321