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RELATED-PARTY TRANSACTIONS AND ARRANGEMENTS - Affiliate Investments and Other - Narrative (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 31, 2023 USD ($) ft² | Feb. 28, 2023 USD ($) ft² | Feb. 28, 2022 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) ft² asset | Dec. 31, 2022 USD ($) | Aug. 07, 2019 ft² | May 15, 2019 ft²
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Investment in unconsolidated entity |  |  |  |  | $ 14,279,000 | $ 22,652,000 |  |
Percentage of ownership acquired |  |  |  |  |  | 100.00% |  |
Rental and other property income |  |  |  |  | 66,002,000 | $ 56,226,000 |  |
(Loss) income from unconsolidated entities |  |  |  |  | $ (427,000) | 164,000 |  |
1910 Sunset Boulevard |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Investment in unconsolidated entity |  |  | $ 22,400,000 |  |  |  |  |
Ownership Interest |  |  |  |  | 44.20% |  |  |
(Loss) income from unconsolidated entities |  |  |  |  | $ (2,400,000) | 164,000 |  |
1910 Sunset Boulevard | Office Building |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Square Feet | ft² |  |  |  |  | 104,764 |  |  |
1902 Park Avenue |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Ownership Interest |  |  |  |  | 50.00% |  |  |
1902 Park JV |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Investment in unconsolidated entity |  | $ 6,600,000 |  |  |  |  |  |
1015 N Mansfield Avenue |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Ownership Interest |  |  |  |  | 28.80% |  |  |
1015 N Mansfield Avenue | Office Building |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Square Feet | ft² |  |  |  |  | 44,141 |  |  |
4750 Wilshire Boulevard |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Ownership Interest |  |  |  |  | 20.00% |  |  |
4750 Wilshire Boulevard | Office Building |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Square Feet | ft² |  | 30,335 |  |  | 30,335 |  |  |
4750 Wilshire JV |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Ownership Interest |  |  |  |  | 20.00% |  |  |
Eleven year lease | 4750 Wilshire Boulevard |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Ownership percentage sold |  | 80.00% |  |  |  |  |  |
Eleven year lease | 4750 Wilshire JV |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Ownership Interest |  | 20.00% |  |  |  |  |  |
Acquisition Of Four Assets |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Number of assets from entities | asset |  |  |  |  | 4 |  |  |
Payment for interest acquired |  |  |  |  | $ 282,900,000 |  |  |
Corporate Joint Venture | 1910 Sunset Boulevard |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Investment in unconsolidated entity |  |  | $ 51,000,000 |  |  |  |  |
Corporate Joint Venture | 1902 Park Avenue |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Purchase price |  | $ 19,100,000 |  |  |  |  |  |
Ownership Interest |  | 50.00% |  |  |  |  |  |
(Loss) income from unconsolidated entities |  |  |  |  | 156,000 |  |  |
Corporate Joint Venture | 1902 Park JV | Mortgages Payable |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 9,600,000 |  |  |  |  |  |
Corporate Joint Venture | 1015 N Mansfield Avenue |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Purchase price | $ 18,000,000 |  |  |  |  |  |  |
Ownership Interest | 28.80% |  |  |  |  |  |  |
Percentage of ownership acquired | 100.00% |  |  |  |  |  |  |
(Loss) income from unconsolidated entities |  |  |  |  | 13,000 |  |  |
Corporate Joint Venture | 1015 N Mansfield Avenue | Office Building |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Area of land (square feet) | ft² | 44,141 |  |  |  |  |  |  |
Corporate Joint Venture | 4750 Wilshire Boulevard |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
(Loss) income from unconsolidated entities |  |  |  |  | 1,800,000 |  |  |
Corporate Joint Venture | Eleven year lease |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Operating lease term |  |  |  |  |  |  |  | 11 years
Square Feet | ft² |  |  |  |  |  |  | 30,000 | 32,000
Rental and other property income |  |  |  | $ 194,000 |  | $ 1,500,000 |  |
Corporate Joint Venture | Eleven year lease | 4750 Wilshire JV |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
(Loss) income from unconsolidated entities |  |  |  |  | $ 170,000 |  |  |

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