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Financial Instruments (Reconciliation Of Changes In Fair Value Of Level 3 Liabilities) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Fair Value Disclosures [Abstract]      
Beginning balance $ (49,400)    
Change in valuation 9,000 $ (8,870) $ (4,523)
Ending balance $ (40,400) $ (49,400)