Segment Data (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) segment item	Dec. 31, 2022 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of business segments | segment	2
Number of reportable segments | segment	2
Number of measures utilized of segment profit to assess performance and allocate resources | item	2
Assets	$ 10,178,441	$ 10,585,041
Domestic Site Leasing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	5,400,000	5,900,000
Assets	5,876,648	6,308,204
International Site Leasing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	3,400,000	3,500,000
Assets	3,871,164	3,808,699
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets	$ 2,100,000
Brazil [Member] | International Site Leasing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Assets		$ 2,000,000
Foreign Countries, Other than Brazil [Member] | Long-Lived Assets [Member] | Maximum [Member] | Geographic Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	5.00%	5.00%