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Stock-Based Compensation (Assumptions For PSU Awards) (Details) - Performance Shares [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate 2.47% 0.19% 0.19%
Expected life 2 years 9 months 18 days 2 years 10 months 24 days 2 years 2 months 12 days
Expected volatility 91.00% 82.20% 88.40%
Expected dividends $ 0 $ 0 $ 0
Forfeiture rate 0.00% 0.00% 0.00%