Segment Data (Schedule of Segment Reporting Information) (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenues		$ 675,516	$ 619,770
Cost of revenues		164,304	152,928
Operating profit		511,212	466,842
Selling, general, and administrative expenses	[1]	72,209	62,124
Acquisition and new business initiatives related adjustments and expenses		6,057	5,104
Asset impairment and decommission costs		26,390	8,512
Depreciation, amortization and accretion		182,415	174,323
Operating income		224,141	216,779
Other expense, net (principally interest expense and other income)		(80,079)	12,004
Income before income taxes		144,062	228,783
Cash capital expenditures		69,320	253,863
Site leasing		617,268	559,432
Assets		10,541,529		$ 10,585,041
Domestic Site Leasing [Member]
Segment Reporting Information [Line Items]
Revenues		454,833	432,986
Cost of revenues		69,750	65,804
Operating profit		385,083	367,182
Selling, general, and administrative expenses		31,743	23,373
Acquisition and new business initiatives related adjustments and expenses		3,232	3,599
Asset impairment and decommission costs		19,435	5,483
Depreciation, amortization and accretion		119,487	123,133
Operating income		211,186	211,594
Cash capital expenditures		44,636	39,545
Assets		6,186,249		6,308,204
International Site Leasing [Member]
Segment Reporting Information [Line Items]
Revenues		162,435	126,446
Cost of revenues		50,369	41,351
Operating profit		112,066	85,095
Selling, general, and administrative expenses		16,730	15,494
Acquisition and new business initiatives related adjustments and expenses		2,825	1,505
Asset impairment and decommission costs		4,886	3,029
Depreciation, amortization and accretion		60,412	48,881
Operating income		27,213	16,186
Cash capital expenditures		23,033	211,771
Assets		3,855,779		3,808,699
Site Development [Member]
Segment Reporting Information [Line Items]
Revenues		58,248	60,338
Cost of revenues		44,185	45,773
Operating profit		14,063	14,565
Selling, general, and administrative expenses		6,077	5,522
Depreciation, amortization and accretion		916	588
Operating income		7,070	8,455
Cash capital expenditures		395	966
Assets		127,215		158,137
Other [Member]
Segment Reporting Information [Line Items]
Selling, general, and administrative expenses		17,659	17,735
Asset impairment and decommission costs		2,069
Depreciation, amortization and accretion		1,600	1,721
Operating income		(21,328)	(19,456)
Other expense, net (principally interest expense and other income)		(80,079)	12,004
Cash capital expenditures		1,256	$ 1,581
Assets		372,286		310,001
Brazil [Member] | International Site Leasing [Member]
Segment Reporting Information [Line Items]
Revenues		$ 93,800		$ 65,200
Maximum [Member] | Revenue [Member] | Geographic Concentration Risk [Member] | Foreign Countries, Other than Brazil [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage		5.00%	5.00%

[1] Includes non-cash compensation of $25,529 and $24,116 for the three months ended March 31, 2023 and 2022, respectively.