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Income Taxes (Income Tax Expense From Continuing Operations And Effective Tax Rate) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Income Tax Disclosure [Abstract]    
Income tax expense from continuing operations $ 37,963 $ (143,303)
Effective tax rate 20.00% (75.00%)