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Income Taxes (Income Tax Expense From Continuing Operations And Effective Tax Rate) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Income Tax Disclosure [Abstract]        
Income tax expense from continuing operations $ 36,527 $ 36,772 $ 54,699 $ 67,909
Effective tax rate 22.00% 23.00% 17.00% 22.00%