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Intangible Assets, Goodwill and Other (Tables)
3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule Of Identifiable Intangible Assets [Table Text Block]
(in thousands)
March 31, 2022December 31, 2021March 31, 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(19,425)(19,013)(17,775)
Accumulated amortization(33,623)(33,211)(31,973)
Net carrying amount3,575 3,987 5,225 
Intangible assets with indefinite lives97,921 97,921 97,921 
Intangible assets, net$101,496 $101,908 $103,146 
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$1,237 
20231,650 
2024688 
2025— 
2026— 
2027—