Subsequent Event (Details)	Aug. 07, 2020 USD ($) period	Jun. 26, 2019	Jun. 30, 2020	Dec. 31, 2019
Subsequent Event
Subsequent Event [Line Items]
Assets held-for-sale	$ 213,000,000
Term of contract	10 years
Optional renewal periods | period	5
Renewal term	5 years
Lease payment potentially due	$ 13,500,000
Potential loss of rental income	2,300,000
Reduction of direct operating expenses	2,300,000
Noncash intangible amortization	$ 1,500,000
Towers to acquire, closing condition	85.00%
Towers to acquire, closing condition, at first closing	92.50%
6.75% Senior Notes
Subsequent Event [Line Items]
Interest rate		6.75%	6.75%	6.75%
Reinvestment right period		12 months