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SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION - Summary of Activity (Details) | 12 Months Ended
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Dec. 31, 2017 USD ($) property item | Dec. 31, 2016 USD ($) property | Dec. 31, 2015 USD ($) property
Reconciliation of total real estate carrying value for the years ended: |  |  |
Balance at Beginning of Period | $ 13,904,519,436 | $ 12,310,846,785 | $ 11,172,348,415
Acquisitions | 1,531,960,811 | 1,857,783,837 | 1,279,388,017
Less amounts allocated to acquired lease intangible assets and liabilities on our Consolidated Balance Sheets | (238,556,294) | (139,341,205) | (63,808,207)
Equipment | 0 | 0 | 0
Improvements, Etc. | 11,067,322 | 16,405,486 | 10,803,029
Other (Leasing Costs and Building Adjustments as a result of net debt premiums) | 1,584,152 | 1,495,439 | 748,126
Total Additions | 1,306,055,991 | 1,736,343,557 | 1,227,130,965
Cost of Real Estate sold or disposed of | 150,394,756 | 118,792,948 | 76,659,381
Cost of Equipment sold | 0 | 0 | 0
Releasing costs | 109,986 | 418,772 | 592,815
Other (including Provisions for Impairment) | 33,027,270 | 23,459,186 | 11,380,399
Total Deductions | 183,532,012 | 142,670,906 | 88,632,595
Balance at Close of Period | 15,027,043,415 | 13,904,519,436 | 12,310,846,785
Reconciliation of accumulated depreciation for the years ended: |  |  |
Balance at Beginning of Period | 2,000,728,517 | 1,691,963,148 | 1,390,808,700
Additions During Period - Provision for Depreciation | 393,415,491 | 355,030,226 | 320,512,807
Deductions During Period: Accumulated depreciation of real estate and equipment sold or disposed of | 43,599,882 | 46,264,857 | 19,358,359
Balance at Close of Period | $ 2,350,544,126 | $ 2,000,728,517 | $ 1,691,963,148
Number of properties on which provisions for impairment were recorded | property | 26 | 39 | 15
Adjustments to estimated legal obligations related to asset retirement obligations | $ 9,774 | $ 6,525 | $ (820,166)
Number of land leases with adjustments recorded to estimated legal obligations related to asset retirement obligations | item | 2 |  |

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- Definition Represents the value of improvements made to real estate. + References No definition available. + Details
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- Definition Represents the number of land leases with adjustments recorded to estimated legal obligations related to asset retirement obligations during the period. + References No definition available. + Details
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- Definition Represents the number of properties on which provisions for impairment were recorded. + References No definition available. + Details
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- Definition Represents the amount of real estate investments acquired allocated to intangible assets that are included in Other Assets on the Consolidated Balance Sheets. + References No definition available. + Details
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- Definition Represents the carrying amount of equipment sold during the period. + References No definition available. + Details
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- Definition Represents the amount of decrease to real estate investments during the period. + References No definition available. + Details
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- Definition Represents the costs relating to releasing activities deducted from the carrying amount of real estate investments during the period. + References No definition available. + Details
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- Definition The increase (decrease) during the reporting period in the carrying amount of asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of 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.FN4) -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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- Definition Amount of decrease to accumulated depreciation for real estate investments sold for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: 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 Reference 2: 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.FN4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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- Definition Amount of real estate investments sold for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28.4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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- Definition Amount, before accumulated depreciation, of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28.4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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- Definition Amount of depreciation expense of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: 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 Reference 2: 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.FN4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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