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Intangible Assets, Goodwill and Other (Tables)
 6 Months Ended
Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule Of Identifiable Intangible Assets [Table Text Block]
(in thousands)
June 30, 2022December 31, 2021June 30, 2021
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(19,838)(19,013)(18,188)
Accumulated amortization(34,036)(33,211)(32,386)
Net carrying amount3,162 3,987 4,812 
Intangible assets with indefinite lives97,921 97,921 97,921 
Intangible assets, net$101,083 $101,908 $102,733 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
The following table presents the remaining estimated annual amortization expense for the years 2022 through 2027:

(in thousands)
2022$824 
20231,650 
2024688 
2025— 
2026— 
2027—