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Income Taxes (Components Of Income Before Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Domestic operations $ 1,664,762 $ 99,373 $ 337,704
Foreign operations 621,046 (107,228) (250,409)
Income (Loss) Before Income Taxes $ 2,285,808 $ (7,855) $ 87,295