Annual report pursuant to Section 13 and 15(d)

Intangible Assets, Net and Goodwill (Schedule of Identifiable Intangible Assets) (Details)

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Intangible Assets, Net and Goodwill (Schedule of Identifiable Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Summary of Identifiable Intangible Assets [Line Items]      
Gross carrying amount $ 37,198 $ 37,198  
Accumulated amortization (34,861) (33,211)  
Net carrying amount 2,337 3,987  
Intangible assets not subject to amortization 79,221 97,921  
Intangible Assets, Net (Excluding Goodwill), Total 81,558 101,908  
Amortization of Intangible Assets 1,700 1,700 $ 2,500
Patents And Purchased Technology [Member]      
Summary of Identifiable Intangible Assets [Line Items]      
Gross carrying amount 14,198 14,198  
Accumulated amortization (14,198) (14,198)  
Customer Relationships [Member]      
Summary of Identifiable Intangible Assets [Line Items]      
Gross carrying amount 23,000 23,000  
Accumulated amortization $ (20,663) $ (19,013)