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Property, Plant And Equipment, Intangible Assets And Goodwill (Schedule Of Changes In Carrying Amount Of Goodwill) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Goodwill [Line Items] |  |
Balance | $ 4,128,887 | $ 4,187,424
Acquisitions | 0 | 10,998
Dispositions | (6,934) | 0
Foreign currency | 8,624 | (20,353)
Assets held for sale | (10,337) | (49,182)
Other | 0 |
Balance | 4,120,240 | 4,128,887
iHM [Member] |  |
Goodwill [Line Items] |  |
Balance | 3,288,481 | 3,288,481
Acquisitions | 0 | 0
Dispositions | 0 | 0
Foreign currency | 0 | 0
Other | 0 |
Balance | 3,288,481 | 3,288,481
Americas Outdoor Advertising [Member] |  |
Goodwill [Line Items] |  |
Balance | 534,683 | 584,574
Acquisitions | 0 | 0
Dispositions | (6,934) | 0
Foreign currency | (1,210) | (709)
Assets held for sale | (10,337) | (49,182)
Other | 0 |
Balance | 516,202 | 534,683
International Outdoor Advertising [Member] |  |
Goodwill [Line Items] |  |
Balance | 223,892 | 232,538
Acquisitions | 0 | 10,998
Dispositions | 0 | 0
Foreign currency | 9,834 | (19,644)
Other | 0 |
Balance | 233,726 | 223,892
Other [Member] |  |
Goodwill [Line Items] |  |
Balance | 81,831 | 81,831
Acquisitions | 0 | 0
Dispositions | 0 | 0
Foreign currency | 0 | 0
Other | 0 |
Balance | $ 81,831 | $ 81,831

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- Definition Amount of divestiture 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 (d) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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