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Investment in Real Estate - Narrative (Details) |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 18, 2020 USD ($) ft² | Jul. 30, 2020 USD ($) ft² | Jun. 30, 2020 | Dec. 31, 2020 USD ($) property | Dec. 31, 2019 USD ($) property | Dec. 31, 2018 USD ($) | Dec. 24, 2020 | Jun. 05, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Impairment loss |  |  |  | $ 0 | $ 52,201,000 | $ 0 |  |
Gains on sale of real estate |  |  |  | $ 0 | $ 47,100,000 | $ 43,337,000 |  |
Number of real estate properties, held-for-sale | property |  |  |  | 0 | 0 |  |  |
Joint Venture Sun Valley Property |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  | 50.00% |  |  | 50.00% |
Joint Venture, Blackstone |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  | 20.00% |  |  |  | 20.00%
1918 Eighth |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Acquisitions, square feet | ft² | 668,109 |  |  |  |  |  |  |
Acquisitions, purchase price | $ 625,000,000 |  |  |  |  |  |  |
VIE, ownership percentage | 55.00% |  |  |  |  |  |  |
Hollywood Media Portfolio |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Area | ft² |  | 2,200,000 |  |  |  |  |  |
Hollywood Media Portfolio | Specific Studio Properties |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Area | ft² |  | 1,100,000 |  |  |  |  |  |
Hollywood Media Portfolio |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Ownership percentage sold |  | 49.00% | 49.00% |  |  |  |  |
Portfolio valuation |  | $ 1,650,000,000 |  |  |  |  |  |
Cash proceeds |  | $ 808,500,000 |  |  |  |  |  |
Percentage ownership retained |  | 51.00% |  |  |  |  |  |

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