Schedule III - Schedule of Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2021
Schedule III - Schedule of Real Estate and Accumulated Depreciation [Abstract]
Schedule III - Schedule of Real Estate and Accumulated Depreciation	Schedule III—Schedule of Real Estate and Accumulated Depreciation Gross Accumulated Life on Which Cost Amount Depreciation/ Depreciation Capitalized Carried Amortization in Latest Initial Subsequent at Close at Close Income Cost to to of Current of Current Date of Date Statement is Description Encumbrances Company Acquisition Period Period Construction Acquired Computed (in thousands) 34,177 sites(1)$ 9,396,000 (2) (3) (3) $ 7,068,208 (4)(5) $ (3,644,238)(5)Various Various Up to 70 years(5)(1)No single site exceeds 5% of the aggregate gross amounts at which the assets were carried at the close of the period set forth in the table above.(2)As of December 31, 2021, certain assets secure debt of $9.4 billion.(3)The Company has omitted this information, as it would be impracticable to compile such information on a site-by-site basis.(4)Does not include those sites under construction.(5)Amounts include the acquisition of the exclusive right to lease and operate 713 utility transmission structures, which included existing wireless tenant licenses from PG&E. 2021 2020 2019 (in thousands)Gross amount at beginning$ 5,963,048  $ 5,833,338  $ 5,561,005 Additions during period: Acquisitions (1) 995,063  80,582  111,734 Construction and related costs on new builds 45,802  40,493  48,975 Augmentation and tower upgrades 32,953  36,211  63,998 Land buyouts and other assets 24,944  28,918  39,298 Tower maintenance 34,611  28,426  28,960 Other (2) 20,052  19,142  —Total additions 1,153,425  233,772  292,965 Deductions during period: Cost of real estate sold or disposed (192) — (856)Impairment (15,552) (17,064) (9,587)Other (3) (32,521) (86,998) (10,189)Total deductions (48,265) (104,062) (20,632)Balance at end$ 7,068,208  $ 5,963,048  $ 5,833,338  (1)Inclusive of changes between the final purchase price allocation and the preliminary purchase price allocations. In addition, amounts as of December 31, 2021 include the acquisition of the exclusive right to lease and operate 713 utility transmission structures, which included existing wireless tenant licenses from PG&E.(2)Represents changes to the Company’s asset retirement obligations.(3)Primarily represents cumulative translation adjustments related to changes in foreign currency exchange rates. 2021 2020 2019 (in thousands)Gross amount of accumulated depreciation at beginning$ (3,383,370) $ (3,133,061) $ (2,868,507)Additions during period: Depreciation (1) (273,655) (275,947) (269,606)Other (2) (91) (38) (83)Total additions (273,746) (275,985) (269,689)Deductions during period: Amount of accumulated depreciation for assets sold or disposed 3,638  4,244  2,887 Other (2) 9,240  21,432  2,248 Total deductions 12,878  25,676  5,135 Balance at end$ (3,644,238) $ (3,383,370) $ (3,133,061)(1)Amounts as of December 31, 2021 include accumulated depreciation related to the acquisition of the exclusive right to lease and operate 713 utility transmission structures, which included existing wireless tenant licenses from PG&E.(2)Primarily represents cumulative translation adjustments related to changes in foreign currency exchange rates.