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Income Taxes (US And Foreign Pre-Tax Income) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Total income before taxes $ (43,288) $ (11,967) $ 5,923
US [Member]      
Total income before taxes (45,927) (3,736) 1,329
Foreign [Member]      
Total income before taxes $ 2,639 $ (8,231) $ 4,594