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Income Taxes (Reconciliation Of Income Tax At Effective Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax expense at federal statutory rate	$ (209,654)	$ (203,410)	$ (170,677)
State taxes, net of federal benefit	(13,029)	(14,517)	(9,616)
Differences between statutory rate and foreign effective tax rate	83,808	79,087	66,238
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	(186,800)	0	0
U.S tax on foreign earnings, net of foreign tax credits	162,353	0	0
Foreign Withholding Tax	33,619	0	0
Other	6,283	(1,688)	1,641
Income tax (expense) benefit	$ 141,764	$ 140,528	$ 112,414

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

+ References

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-Publisher FASB
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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