Business Combinations and Asset Acquisitions - Additional Information (Details) shares in Millions				3 Months Ended
	Mar. 15, 2017 USD ($) Tower	Jan. 31, 2017 USD ($) Tower	Aug. 31, 2016 USD ($) shares	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Cash paid for business acquisition				$ 64,622,000
Contingent consideration			$ 98,600,000	90,719,000	$ 98,600,000
Reduction of purchase price and goodwill				$ (248,000)
NMS
Business Acquisition [Line Items]
Business acquisition date				Jan. 31, 2017
Number of wireless towers owned | Tower		366
Cash paid for business acquisition		$ 62,565,000
Deferred Tax Liabilities		18,400,000
Unrecognized tax benefits		5,300,000		$ 5,300,000
Intangible assets		52,437,000
Acquired below-market leases intangible liability		$ 3,440,000
Acquired finite-lived intangible liability, weighted average useful life		10 years
Number of towers construction completed | Tower	24
Payment for acquisition	$ 2,100,000
NMS | Tenant Contracts
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 37,400,000
Acquired finite-lived intangible assets, weighted average useful life		22 years
NMS | Network
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 13,500,000
Acquired finite-lived intangible assets, weighted average useful life		22 years
NMS | Acquire Above-market Leases
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 1,500,000
Acquired finite-lived intangible assets, weighted average useful life		10 years
NMS | Latin America
Business Acquisition [Line Items]
Number of towers additional acquisition when construction is completed | Tower		105
NMS | Mexico
Business Acquisition [Line Items]
Number of wireless towers owned | Tower		212
NMS | Nicaragua
Business Acquisition [Line Items]
Number of wireless towers owned | Tower		54
NMS | Colombia
Business Acquisition [Line Items]
Number of wireless towers owned | Tower		100
Tower Cloud
Business Acquisition [Line Items]
Business acquisition date				Aug. 31, 2016
Cash paid for business acquisition			187,500,000
Intangible assets			$ 116,218,000
Percentage of equity acquired			100.00%
Additional contingent consideration			$ 130,000,000
Contingent consideration			$ 98,600,000
Reduction of purchase price and goodwill				$ (200,000)
Tower Cloud | Common Stock
Business Acquisition [Line Items]
Issuance of shares | shares			1.9
Fair value of shares issued for acquisition			$ 58,500,000
Tower Cloud | Minimum
Business Acquisition [Line Items]
Percentage of aggregate amount of contingent consideration payments			50.00%