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Acquisitions - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Business Acquisition [Line Items] |  |
Total purchase price of outdoor advertising assets | $ 97,230 | $ 230,009
Total purchase price of outdoor advertising assets paid in cash | 92,248 | 206,068
Non cash consideration of outdoor advertising assets | 4,982 | 23,941
Gain on exchange of outdoor advertising assets | 67 | 9,805
Total acquired intangible assets | 79,784 | 157,484
Portion of acquired intangible assets assigned to goodwill | 18,631 | 60,968
Amount deductible for tax purposes | 18,582 | 23,937
Aggregate amortization expense related to acquisition | 2,158 | 679
Other [Member] |  |
Business Acquisition [Line Items] |  |
Weighted average useful life | 14 years | 14 years
Total acquired intangible assets | 61,153 | 96,516
Customer lists and contracts [Member] |  |
Business Acquisition [Line Items] |  |
Total acquired intangible assets | 10,390 | 18,148
Weighted average useful life | 7 years | 7 years
Site locations [Member] |  |
Business Acquisition [Line Items] |  |
Total acquired intangible assets | $ 50,333 | $ 78,288
Weighted average useful life | 15 years | 15 years

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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