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Property, Plant And Equipment, Intangible Assets And Goodwill (Schedule Of Changes In Carrying Amount Of Goodwill) (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Line Items] |  |
Balance | $ 4,202,187 | $ 4,216,085
Impairment |  | (10,684)
Acquisitions | 18,199 | 97
Dispositions |  | (456)
Foreign currency | (33,022) | (974)
Other | 60 | (1,881)
Balance | 4,187,424 | 4,202,187
iHM [Member] |  |
Goodwill [Line Items] |  |
Balance | 3,234,807 | 3,236,688
Impairment |  | 0
Acquisitions | 17,900 | 0
Dispositions |  | 0
Foreign currency | 0 | 0
Other | 60 | (1,881)
Balance | 3,252,767 | 3,234,807
Americas Outdoor Advertising [Member] |  |
Goodwill [Line Items] |  |
Balance | 585,227 | 585,307
Impairment |  | 0
Acquisitions | 0 | 0
Dispositions |  | 0
Foreign currency | (653) | (80)
Other | 0 |
Balance | 584,574 | 585,227
International Outdoor Advertising [Member] |  |
Goodwill [Line Items] |  |
Balance | 264,907 | 276,941
Impairment | (10,700) | (10,684)
Acquisitions | 0 | 0
Dispositions |  | (456)
Foreign currency | (32,369) | (894)
Other | 0 |
Balance | 232,538 | 264,907
Other [Member] |  |
Goodwill [Line Items] |  |
Balance | 117,246 | 117,149
Impairment |  | 0
Acquisitions | 299 | 97
Dispositions |  | 0
Foreign currency | 0 | 0
Other | 0 | 0
Balance | $ 117,545 | $ 117,246

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- Definition 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. + References 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 + Details
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