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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investments in Real Estate (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Investments in Real Estate |  |  |  |  |
Impairment of real estate | $ 2,800,000 | $ 66,200,000 | $ 0 | $ 69,000,000 | $ 0
Buildings and improvements | Minimum |  |  |  |  |
Investments in Real Estate |  |  |  |  |
Estimated useful lives |  |  |  | 15 years |
Buildings and improvements | Maximum |  |  |  |  |
Investments in Real Estate |  |  |  |  |
Estimated useful lives |  |  |  | 40 years |
Furniture, fixtures, and equipment | Minimum |  |  |  |  |
Investments in Real Estate |  |  |  |  |
Estimated useful lives |  |  |  | 3 years |
Furniture, fixtures, and equipment | Maximum |  |  |  |  |
Investments in Real Estate |  |  |  |  |
Estimated useful lives |  |  |  | 5 years |

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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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