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Asset Retirement Obligation - Narrative (Details)	9 Months Ended
	Sep. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligation Expected Term	50 years
Asset Retirement Obligations, Description	The obligation is calculated based on the assumption that all of our advertising structures will be removed within the next 50 years.

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- Definition

Asset Retirement Obligation Expected Term

+ References

No definition available.

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- Definition

A general description of the asset retirement obligations and the associated long-lived assets. Description may include the terms of the legal restriction.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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