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Schedule III - Real Estate And Accumulated Depreciation Property - Real Estate and Accumulated Depreciation Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Real Estate and Accumulated Depreciation [Line Items] |  |  |
Construction in progress | $ 3,246 | $ 4,052 |
Aggregate cost of real estate owned | 2,441,661 |  |
Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward] |  |  |
Balance at beginning of period | 2,204,891 | 2,242,283 | $ 2,521,060
Acquisitions and capital improvements | 52,222 | 359,753 | 245,252
Disposals and write-offs | (35,424) | (397,145) | (524,029)
Balance at end of period | 2,221,689 | 2,204,891 | 2,242,283
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward] |  |  |
Balance at beginning of period | 246,702 | 286,330 | 348,337
Depreciation expense, continuing operations | 61,897 | 66,808 | 73,021
Disposal and write-offs | (16,351) | (106,436) | (135,028)
Balance at end of period | $ 292,248 | $ 246,702 | $ 286,330
Building and other improvements | Minimum |  |  |
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward] |  |  |
Estimated lives used to compute depreciation | 15 years |  |
Building and other improvements | Maximum |  |  |
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward] |  |  |
Estimated lives used to compute depreciation | 30 years |  |
Furniture, fixtures and equipment | Minimum |  |  |
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward] |  |  |
Estimated lives used to compute depreciation | 5 years |  |
Furniture, fixtures and equipment | Maximum |  |  |
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward] |  |  |
Estimated lives used to compute depreciation | 20 years |  |

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- Definition Cost basis of real estate investments for federal income tax purposes for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Footnote 6 -Subsection 28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 6)) -URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + Details
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- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column F)) -URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 4)) -URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + Details
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- Definition Useful life on which depreciation was computed for entities with a substantial portion of business acquiring and holding investment real estate, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column I)) -URI http://asc.fasb.org/extlink&oid=120402810&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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 4)) -URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + Details
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- Definition Amount, before accumulated depreciation, of real estate investment by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes real estate not held as investment or interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column E)) -URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + Details
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