Intangible Assets, Goodwill and Other (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill and Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 7,993,000	$ 7,997,000
Accumulated amortization of intangible assets	(4,397,000)	(3,951,000)
Finite-Lived Intangible Assets, Net	3,596,000	4,046,000
Amortization expense	446,000	444,000	$ 439,000
Estimated annual amortization expense related to intangible assets - Year 1	446,000
Estimated annual amortization expense related to intangible assets - Year 2	396,000
Estimated annual amortization expense related to intangible assets - Year 3	375,000
Estimated annual amortization expense related to intangible assets - Year 4	370,000
Estimated annual amortization expense related to intangible assets - Year 5	287,000
Goodwill	10,085,000	10,078,000	10,078,000
Goodwill	10,085,000	10,078,000	$ 10,078,000
Acquisitions
Goodwill and Finite-Lived Intangible Assets [Line Items]
Goodwill	7,000
Goodwill	7,000
Site Rental Contracts and Customer Relationships [Member]
Goodwill and Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	7,850,000	7,854,000
Accumulated amortization of intangible assets	(4,315,000)	(3,872,000)
Finite-Lived Intangible Assets, Net	3,535,000	3,982,000
Other Intangible Assets [Member]
Goodwill and Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	143,000	143,000
Accumulated amortization of intangible assets	(82,000)	(79,000)
Finite-Lived Intangible Assets, Net	$ 61,000	$ 64,000