Acquisitions - Summary of Preliminary Allocation of Acquisition Costs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Property, plant and equipment	$ 18,196	$ 74,326
Goodwill	18,631	60,968
Other asset	1,408	7,763
Current liabilities	(2,158)	(3,424)
Long-term liabilities		(6,140)
Total	97,230	230,009
Site locations [Member]
Business Acquisition [Line Items]
Finite lived intangible assets	50,333	78,288
Non-competition agreements [Member]
Business Acquisition [Line Items]
Finite lived intangible assets	430	80
Customer lists and contracts [Member]
Business Acquisition [Line Items]
Finite lived intangible assets	$ 10,390	$ 18,148

Business Acquisitions Purchase Price Allocation Goodwill Amount

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- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

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- Definition

Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

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-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464

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Amount of liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

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