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Schedule III - Schedule of Real Estate and Accumulated Depreciation | 12 Months Ended
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Dec. 31, 2018
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 |  |  |  |  |  |  |  |  |  |  |  | Life on Which
﻿ |  |  |  |  |  |  |  |  | Cost |  |  | Amount |  |  | Accumulated |  |  |  |  |  |  |  |  | Depreciation
﻿ |  |  |  |  |  |  |  |  | Capitalized |  |  | Carried |  |  | Depreciation |  |  |  |  |  |  |  |  | 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)
﻿29,578 sites | (1) | $ | 7,428,000 | (2) |  | (3) |  |  | (3) |  | $ | 5,561,005 | (4) |  | $ | (2,868,507) |  |  | Various |  |  | Various |  |  | Up to 20 years
| (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, 2018, certain assets secure debt of $7.4 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.
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2018 |  | 2017 |  | 2016
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (in thousands)
﻿Gross amount at beginning |  |  |  |  |  | $ | 5,340,858 |  | $ | 5,079,660 |  | $ | 4,839,874
﻿Additions during period: |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Acquisitions (1) |  |  |  |  |  |  | 131,686 |  |  | 112,979 |  |  | 72,456
﻿Construction and related costs on new builds |  |  |  |  |  |  | 54,237 |  |  | 70,361 |  |  | 58,143
﻿Augmentation and tower upgrades |  |  |  |  |  |  | 49,201 |  |  | 43,288 |  |  | 37,861
﻿Land buyouts and other assets |  |  |  |  |  |  | 37,032 |  |  | 41,657 |  |  | 44,574
﻿Tower maintenance |  |  |  |  |  |  | 30,048 |  |  | 29,391 |  |  | 28,257
﻿Other (2) |  |  |  |  |  |  | — |  |  | — |  |  | 45,829
﻿Total additions |  |  |  |  |  |  | 302,204 |  |  | 297,676 |  |  | 287,120
﻿Deductions during period: |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cost of real estate sold or disposed |  |  |  |  |  |  | (1,083) |  |  | (1,027) |  |  | (12,842)
﻿Impairment |  |  |  |  |  |  | (17,130) |  |  | (34,101) |  |  | (34,492)
﻿Other (2) |  |  |  |  |  |  | (63,844) |  |  | (1,350) |  |  | —
﻿Total deductions |  |  |  |  |  |  | (82,057) |  |  | (36,478) |  |  | (47,334)
﻿Balance at end |  |  |  |  |  | $ | 5,561,005 |  | $ | 5,340,858 |  | $ | 5,079,660
| (1) |  | Inclusive of changes between the final purchase price allocation and the preliminary purchase price allocations.
| (2) |  | Primarily represents cumulative translation adjustments related to changes in foreign currency exchange rates.
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2018 |  | 2017 |  | 2016
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (in thousands)
﻿Gross amount of accumulated depreciation at beginning |  |  |  |  |  | $ | (2,627,841) |  | $ | (2,396,587) |  | $ | (2,160,530)
﻿Additions during period: |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Depreciation |  |  |  |  |  |  | (257,469) |  |  | (248,818) |  |  | (254,982)
﻿Other (1) |  |  |  |  |  |  | (25) |  |  | — |  |  | (5,557)
﻿Total additions |  |  |  |  |  |  | (257,494) |  |  | (248,818) |  |  | (260,539)
﻿Deductions during period: |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Amount of accumulated depreciation for assets sold or disposed |  |  |  |  |  |  | 4,392 |  |  | 17,051 |  |  | 24,482
﻿Other (1) |  |  |  |  |  |  | 12,436 |  |  | 513 |  |  | —
﻿Total deductions |  |  |  |  |  |  | 16,828 |  |  | 17,564 |  |  | 24,482
﻿Balance at end |  |  |  |  |  | $ | (2,868,507) |  | $ | (2,627,841) |  | $ | (2,396,587)
| (1) |  | Primarily represents cumulative translation adjustments related to changes in foreign currency exchange rates.

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- Definition The entire disclosure of real estate investments and associated accumulated depreciation for entities with a significant portion of their business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 + Details
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