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Income Taxes (Schedule Of Income Before Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
United States $ (33,790) $ (13,756) $ (23,645)
Foreign 51,083 41,025 79,186
Income before income taxes $ 17,293 $ 27,269 $ 55,541