Segment Data (Schedule of Segment Reporting Information) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues		$ 619,770	$ 548,739
Cost of revenues		152,928	129,774
Operating profit		466,842	418,965
Selling, general, and administrative expenses	[1]	62,124	51,601
Acquisition and new business initiatives related adjustments and expenses		5,104	5,001
Asset impairment and decommission costs		8,512	4,903
Depreciation, amortization and accretion		174,323	183,881
Operating income		216,779	173,579
Other income (expense) (principally interest expense and other expense)		12,004	(206,246)
Income (loss) before income taxes		228,783	(32,667)
Cash capital expenditures		253,863	1,078,245
Assets		10,142,100		$ 9,801,699
Domestic Site Leasing [Member]
Segment Reporting Information [Line Items]
Revenues		432,986	403,579
Cost of revenues		65,804	65,120
Operating profit		367,182	338,459
Selling, general, and administrative expenses		23,373	28,056
Acquisition and new business initiatives related adjustments and expenses		3,599	3,332
Asset impairment and decommission costs		5,483	3,871
Depreciation, amortization and accretion		123,133	137,054
Operating income		211,594	166,146
Cash capital expenditures		39,545	1,059,678
Assets		6,522,827		6,628,156
International Site Leasing [Member]
Segment Reporting Information [Line Items]
Revenues		126,446	101,524
Cost of revenues		41,351	30,248
Operating profit		85,095	71,276
Selling, general, and administrative expenses		15,494	7,760
Acquisition and new business initiatives related adjustments and expenses		1,505	1,669
Asset impairment and decommission costs		3,029	1,032
Depreciation, amortization and accretion		48,881	43,121
Operating income		16,186	17,694
Cash capital expenditures		211,771	16,947
Assets		3,222,276		2,870,503
Site Development [Member]
Segment Reporting Information [Line Items]
Revenues		60,338	43,636
Cost of revenues		45,773	34,406
Operating profit		14,565	9,230
Selling, general, and administrative expenses		5,522	5,789
Depreciation, amortization and accretion		588	2,082
Operating income		8,455	1,359
Cash capital expenditures		966	870
Assets		100,594		87,410
Other [Member]
Segment Reporting Information [Line Items]
Selling, general, and administrative expenses		17,735	9,996
Depreciation, amortization and accretion		1,721	1,624
Operating income		(19,456)	(11,620)
Other income (expense) (principally interest expense and other expense)		12,004	(206,246)
Cash capital expenditures		1,581	$ 750
Assets		$ 296,403		$ 215,630

[1] Includes non-cash compensation expense of $24,116 and $19,584 for the three months ended March 31, 2022 and 2021, respectively.