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Income Taxes (Summary Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Tax expense	$ 37,767	$ (17,264)	$ 70,185	$ 11,379
Pretax income	$ 234,135	$ 184,499	$ 463,989	$ 435,189
Effective tax rates (percentage)	16.10%	(9.40%)	15.10%	2.60%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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