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Acquisitions - Summary of Allocation of Acquisition Costs (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Business Acquisition [Line Items]
Property, plant and equipment	$ 78,571
Goodwill	158,545
Current assets	4,646
Current liabilities	(4,522)
Total	511,138
Site Locations [Member]
Business Acquisition [Line Items]
Finite lived intangible assets	234,584
Non-competition Agreements [Member]
Business Acquisition [Line Items]
Finite lived intangible assets	20
Customer Lists and Contracts [Member]
Business Acquisition [Line Items]
Finite lived intangible assets	$ 39,294

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Business Acquisitions Purchase Price Allocation Goodwill Amount

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Amount of 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

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=56956791&loc=d3e4845-128472

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

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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 10
-Section 55
-Paragraph 37
-URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464

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

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-SubTopic 20
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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

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