Goodwill and Other Intangible Assets (Schedule Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Goodwill [Line Items]
Goodwill	$ 734,356us-gaap_Goodwill
Goodwill, Period Increase (Decrease)	1,322us-gaap_GoodwillPeriodIncreaseDecrease
Goodwill, Subsequent Recognition of Deferred Tax Asset	(631)
Goodwill, Translation Adjustments	(30,092)us-gaap_GoodwillTranslationAdjustments
Goodwill	704,955us-gaap_Goodwill
National Networks [Member]
Goodwill [Line Items]
Goodwill	250,595
Goodwill, Period Increase (Decrease)	(2,315)
Goodwill, Subsequent Recognition of Deferred Tax Asset	631
Goodwill, Translation Adjustments	0
Goodwill	247,649
International And Other [Member]
Goodwill [Line Items]
Goodwill	483,761
Goodwill, Period Increase (Decrease)	3,637
Goodwill, Subsequent Recognition of Deferred Tax Asset	0
Goodwill, Translation Adjustments	(30,092)
Goodwill	$ 457,306

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of (increase) decrease to an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from the subsequent recognition of deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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