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Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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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. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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