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Income Taxes (Components Of Income Before Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Domestic operations $ 99,373 $ 337,704 $ 288,905
Foreign operations (107,228) (250,409) 341,015
Income (Loss) Before Income Taxes $ (7,855) $ 87,295 $ 629,920