Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance as of January 1	$ 65,631	$ 46,434
Additions based on tax positions related to the current year	1,304,447	28,663
Additions for tax positions of acquired companies	1,413	1,776
Additions for tax positions of prior years	5,098	876
Transition tax planning initiatives	(27,470)	0
Reductions resulting from the lapse of the statute of limitations	(8,110)	(14,502)
Settlements with taxing authorities	(9,773)	(655)
Effects of foreign currency translation		3,039
Effects of foreign currency translation	(523)
Balance as of December 31	$ 1,330,713	$ 65,631

Unrecognized Tax Benefits, Decrease Resulting From Transition Tax Planning Initiatives

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from acquisitions.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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