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DISPOSALS OF OPERATING PROPERTIES AND IMPAIRMENT CHARGES (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) groundLease lease property | Dec. 31, 2020 USD ($) property | Dec. 31, 2019 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of ground lease properties | lease | 12 |  |
Depreciation and amortization | $ 0 | $ 0 | $ 37,723
Seven unnamed impaired properties |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of real estate properties | property |  |  | 7
Depreciation and amortization |  |  | $ 37,700
Property, plant, and equipment, fair value disclosure |  |  | 176,000
Disposed of by sale |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of real estate properties | property |  | 0 |
Proceeds from sale of real estate | 42,000 |  |
Gain on disposal | $ 27,600 |  |
Number of ground lease properties | groundLease | 17 |  |
2021 Operating Properties Sold |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Proceeds from sale of real estate | $ 24,800 |  |
Gain on disposal | $ 4,300 |  |
2021 Operating Properties Sold | Disposed of by sale |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of real estate properties | property | 1 |  |
2020 Redevelopment Property Sold |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Proceeds from sale of real estate |  | $ 14,000 |
Gain on disposal |  | $ 3,100 |
2020 Redevelopment Property Sold | Disposed of by sale |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of real estate properties | property |  | 1 |
2019 Operating Properties Sold |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Proceeds from sale of real estate |  |  | 543,800
Gain on disposal |  |  | $ 39,000
2019 Operating Properties Sold | Disposed of by sale |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of real estate properties | property |  |  | 23

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