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Schedule III Real Estate and Accumulated Depreciation - Summary of Activity (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) property | Dec. 31, 2018 USD ($) property | Dec. 31, 2017 USD ($) property | Jan. 01, 2019 USD ($)
Reconciliation of total real estate carrying value |  |  |  |
Balance at Beginning of Period | $ 16,566,601,986 | $ 15,027,043,415 | $ 13,904,519,436 |
Acquisitions | 3,644,884,106 | 1,802,745,841 | 1,531,960,811 |
Less amounts allocated to acquired lease intangible assets and liabilities on our Consolidated Balance Sheets | (401,318,627) | (89,474,897) | (238,556,294) |
Improvements, Etc. | 17,447,145 | 23,043,158 | 11,067,322 |
Other (Leasing Costs and Building Adjustments as a result of net debt premiums) | 2,740,797 | 2,839,574 | 1,584,152 |
Total Additions | 3,263,753,421 | 1,739,153,676 | 1,306,055,991 |
Cost of Real Estate sold | 129,736,613 | 165,023,825 | 150,394,756 |
Cost of Equipment sold | 11,200 | 15,650 | 0 |
Releasing costs | 673,647 | 232,089 | 109,986 |
Other (including Provisions for Impairment) | 87,951,488 | 34,323,541 | 33,027,270 |
Total Deductions | 218,372,948 | 199,595,105 | 183,532,012 |
Foreign Currency Translation | 25,644,393 | 0 | 0 |
Balance at Close of Period | 19,637,626,852 | 16,566,601,986 | 15,027,043,415 |
Reconciliation of accumulated depreciation |  |  |  |
Balance at Beginning of Period | 2,723,085,290 | 2,350,544,126 | 2,000,728,517 |
Additions During Period - Provision for Depreciation | 481,498,979 | 432,482,396 | 393,415,491 |
Accumulated depreciation of real estate and equipment sold or disposed of | 64,053,838 | 59,941,232 | 43,599,882 |
Foreign Currency Translation | 324,174 | 0 | 0 |
Balance at Close of Period | $ 3,140,854,604 | $ 2,723,085,290 | $ 2,350,544,126 |
Other Disclosure Notes |  |  |  |
Number of properties | property | 6,484 |  |  |
Number of properties secured by mortgages | property | 92 |  |  |
Unamortized net debt premiums on mortgages payable excluded from encumbrances | $ 3,000,000 |  |  |
Aggregate cost for federal income tax purposes | $ 20,070,200,483 |  |  |
Reclassification of right of use assets under finance leases |  |  |  | $ 36,900,000
Number of properties on which provisions for impairment were recorded | property | 51 | 44 | 26 |
U.S. | Single-tenant properties |  |  |  |
Other Disclosure Notes |  |  |  |
Number of properties | property | 6,417 |  |  |
U.S. | Corporate headquarters |  |  |  |
Other Disclosure Notes |  |  |  |
Number of properties | property | 1 |  |  |
U.S. | Crest Net Lease properties |  |  |  |
Other Disclosure Notes |  |  |  |
Number of properties | property | 17 |  |  |
U.S. | Multi-tenant properties |  |  |  |
Other Disclosure Notes |  |  |  |
Number of properties | property | 31 |  |  |
U.K. | Single-tenant properties |  |  |  |
Other Disclosure Notes |  |  |  |
Number of properties | property | 18 |  |  |
Crest Net Lease, Inc |  |  |  |
Other Disclosure Notes |  |  |  |
Aggregate cost for federal income tax purposes | $ 73,548,861 |  |  |

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