Leases (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018	[5]
Property Subject to or Available for Operating Lease [Line Items]
Finance Lease, Right-of-Use Asset		$ 978,100
Operating Leases, Rent Expense, Net	[1],[2]	$ 119,775
Weighted average remaining term of tenant leases		6 years
Maximum Current Term		20 years
Tenant Leases 2019		$ 674,904
Tenant Leases 2020		674,505
Tenant Leases 2023		472,165
Tenant Leases thereafter		1,412,873
Total tenant leases		$ 4,421,423
Percentage of towers that are on land that has non-cancelable operating leases		90.00%
Operating leases, owned land under tower, expiration term		10 years
Operating leases 2019		$ 107,579	[3],[4]	$ 142,671
Operating leases 2020		107,746	[3],[4]	144,069
Operating leases 2021		107,486	[3],[4]	144,390
Operating leases 2022		106,990	[3],[4]	142,144
Operating leases 2023		106,000	[3],[4]	140,193
Operating leases thereafter		1,185,872	[3],[4]	1,697,442
Total operating leases		1,721,673	[3],[4]	$ 2,410,909
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	[3],[4]	(503,212)
Variable Lease, Cost	[1],[6]	37,054
Lease, Cost		156,829
Finance leases right-of-use asset, accumulated amortization		645,600
Amortization of Leased Asset		41,100
Operating Lease, Liability	[3],[4]	1,218,461
Operating Leases, Future Minimum Payments Receivable, in Three Years		661,822
Operating Leases, Future Minimum Payments Receivable, in Four Years		$ 525,154
Greater than 10 Years, Inclusive of Renewals at the Company's Option [Member]
Property Subject to or Available for Operating Lease [Line Items]
Percentage of site rental gross margin that is derived from wireless infrastructure where the lease for the land has a final expiration date		80.00%
Greater than 20 Years, Inclusive of Renewals at the Company's Option [Member]
Property Subject to or Available for Operating Lease [Line Items]
Percentage of site rental gross margin that is derived from wireless infrastructure where the lease for the land has a final expiration date		50.00%

[1] Inclusive of leases with related parties. See note 7.

[2] Represents the Company's operating lease expense related to its ROU assets for the twelve months ended December 31, 2019.

[3] Excludes the Company's contingent payments for operating leases (such as payments based on revenues derived from the sites located on the leased asset) as such arrangements are excluded from the Company's operating lease liability. Such contingencies are recognized as expense in the period they are resolved.

[4] Inclusive of leases with related parties. See note 7.

[5] Inclusive of leases with related parties. See note 7.

[6] Represents the Company's expense related to contingent payments for operating leases (such as payments based on revenues derived from the sites located on the leased asset) for the twelve months ended December 31, 2019. Such contingencies are recognized as expense in the period they are resolved.