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Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Intangible assets    
Total Gross Intangible Assets $ 508,969 $ 508,969
Accumulated Amortization and Impairment 477,568 475,064
Total Net Intangible Assets 31,401 33,905
Technology    
Intangible assets    
Gross Carrying Amount, Definite-lived intangible assets 327,908 327,908
Accumulated Amortization and Impairment, Definite-lived intangible assets 312,142 310,551
Total definite-lived intangible assets 15,766 17,357
Customer relationship    
Intangible assets    
Gross Carrying Amount, Definite-lived intangible assets 146,465 146,465
Accumulated Amortization and Impairment, Definite-lived intangible assets 133,581 132,970
Total definite-lived intangible assets 12,884 13,495
Trademarks and tradenames    
Intangible assets    
Gross Carrying Amount, Definite-lived intangible assets 30,910 30,910
Accumulated Amortization and Impairment, Definite-lived intangible assets 28,159 27,857
Total definite-lived intangible assets 2,751 3,053
Other Intangible Assets    
Intangible assets    
Gross Carrying Amount, Definite-lived intangible assets 3,686 3,686
Accumulated Amortization and Impairment, Definite-lived intangible assets $ 3,686 $ 3,686