Segment Data	12 Months Ended
	Dec. 31, 2021
Segment Data [Abstract]
Segment Data	15.SEGMENT DATAThe Company operates principally in two business segments: site leasing and site development. The Company’s site leasing business includes two reportable segments, domestic site leasing and international site leasing. The Company’s business segments are strategic business units that offer different services. They are managed separately based on the fundamental differences in their operations. The site leasing segment includes results of the managed and sublease businesses. The site development segment includes the results of both consulting and construction related activities. The Company’s Chief Operating Decision Maker utilizes segment operating profit and operating income as his two measures of segment profit in assessing performance and allocating resources at the reportable segment level. The Company has applied the aggregation criteria to operations within the international site leasing segment on a basis that is consistent with management’s review of information and performance evaluations of the individual markets in this region.‎ Revenues, cost of revenues (exclusive of depreciation, accretion and amortization), capital expenditures (including assets acquired through the issuance of shares of the Company’s Class A common stock) and identifiable assets pertaining to the segments in which the Company continues to operate are presented below. Domestic Site Int'l Site Site Leasing Leasing Development Other Total For the year ended December 31, 2021 (in thousands)Revenues $ 1,681,372  $ 422,715  $ 204,747  $ — $ 2,308,834 Cost of revenues (1) 258,612  127,779  159,093  — 545,484 Operating profit 1,422,760  294,936  45,654  — 1,763,350 Selling, general, and administrative expenses 115,458  37,768  20,636  46,167  220,029 Acquisition and new business initiatives related adjustments and expenses 14,452  13,169  — — 27,621 Asset impairment and decommission costs 20,135  12,763  — 146  33,044 Depreciation, amortization and accretion 514,234  177,059  2,295  6,573  700,161 Operating income (loss) 758,481  54,177  22,723  (52,886) 782,495 Other expense (principally interest expense and other expense) (529,931) (529,931)Income before income taxes 252,564 Cash capital expenditures (2) 1,249,075  135,591  2,563  6,269  1,393,498 For the year ended December 31, 2020 Revenues $ 1,558,311  $ 396,161  $ 128,666  $ — $ 2,083,138 Cost of revenues (1) 256,673  117,105  102,750  — 476,528 Operating profit 1,301,638  279,056  25,916  — 1,606,610 Selling, general, and administrative expenses 102,889  34,905  17,663  38,810  194,267 Acquisition and new business initiatives related adjustments and expenses 10,331  6,251  — — 16,582 Asset impairment and decommission costs 28,887  11,210  — — 40,097 Depreciation, amortization and accretion 539,399  174,073  2,356  6,142  721,970 Operating (loss) income 620,132  52,617  5,897  (44,952) 633,694 Other expense (principally interest expense and other expense) (651,443) (651,443)Loss before income taxes (17,749)Cash capital expenditures (2) 303,366  89,762  1,752  6,191  401,071 For the year ended December 31, 2019 Revenues $ 1,487,108  $ 373,750  $ 153,787  $ — $ 2,014,645 Cost of revenues (1) 258,413  115,538  119,080  — 493,031 Operating profit 1,228,695  258,212  34,707  — 1,521,614 Selling, general, and administrative expenses 99,707  32,411  21,525  39,074  192,717 Acquisition and new business initiatives related adjustments and expenses 7,933  7,295  — — 15,228 Asset impairment and decommission costs 24,202  8,899  2  — 33,103 Depreciation, amortization and accretion 527,718  161,183  2,341  5,836  697,078 Operating income (loss) 569,135  48,424  10,839  (44,910) 583,488 Other expense (principally interest expense and other expense) (396,599) (396,599)Income before income taxes 186,889 Cash capital expenditures (2) 287,793  635,728  3,900  4,271  931,692  Domestic Site Int'l Site Site Leasing Leasing Development Other (3) Total Assets (in thousands)As of December 31, 2021 $ 6,628,156  $ 2,870,503  $ 87,410  $ 215,630  $ 9,801,699 As of December 31, 2020 $ 5,893,636  $ 2,955,563  $ 61,729  $ 247,090  $ 9,158,018  (1)Excludes depreciation, amortization, and accretion.(2)Includes cash paid for capital expenditures, acquisitions, and right-of-use assets.(3)Assets in Other consist primarily of general corporate assets and short-term investments. For the years ended December 31, 2021, 2020, and 2019, site leasing revenue in Brazil was $233.5 million, $222.6 million, and $226.7 million, respectively. Other than Brazil, no foreign country represented a material amount of the Company’s total site leasing revenues in any of the periods presented. Total long-lived assets in Brazil were $0.9 billion and $1.0 billion as of December 31, 2021 and 2020, respectively.