Segment Data (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023	Dec. 31, 2023 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of business segments | segment	2
Number of reportable segments | segment	2
Assets	$ 9,995,266		$ 10,178,441
Domestic Site Leasing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	5,400,000		5,400,000
Assets	5,832,986		5,876,648
International Site Leasing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	3,300,000		3,400,000
Assets	3,743,958		3,871,164
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 2,000,000		$ 2,100,000
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%