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RELATED-PARTY TRANSACTIONS - Affiliate Investments and Other Narrative (Details)	1 Months Ended			3 Months Ended		9 Months Ended
	Oct. 31, 2023 USD ($) ft²	Feb. 28, 2023 USD ($) ft²	Feb. 28, 2022 USD ($)	Sep. 30, 2025 USD ($) ft²	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) ft²	Sep. 30, 2024 USD ($)	Oct. 31, 2024	May 15, 2019 ft²
Related Party Transaction [Line Items]
Payments to acquire equity method investment						$ 1,209,000	$ 1,463,000
Rental and other property income				$ 16,162,000	$ 18,150,000	49,161,000	56,172,000
Income from unconsolidated entities				$ (697,000)	(1,239,000)	(2,285,000)	(442,000)
Corporate Joint Venture | Eleven Year Lease
Related Party Transaction [Line Items]
Lease, term of contract with related party									11 years
Rentable area (square feet) | ft²									30,000
Affiliated Entity
Related Party Transaction [Line Items]
Consolidated net worth						105,000,000.0
Liquid assets						$ 6,000,000.0
1910 Sunset Boulevard
Related Party Transaction [Line Items]
Payments to acquire equity method investment			$ 22,400,000
Ownership Interest				44.20%		44.20%
1910 Sunset Boulevard | Office Building
Related Party Transaction [Line Items]
Rentable area (square feet) | ft²				105,064		105,064
1910 Sunset Boulevard | Corporate Joint Venture
Related Party Transaction [Line Items]
Payments to acquire equity method investment			$ 51,000,000
1902 Park Avenue
Related Party Transaction [Line Items]
Ownership Interest				25.50%		25.50%
1902 Park Avenue | Corporate Joint Venture
Related Party Transaction [Line Items]
Purchase price		$ 19,100,000
Ownership Interest		50.00%						25.50%
1015 N Mansfield Avenue
Related Party Transaction [Line Items]
Ownership Interest				28.80%		28.80%
1015 N Mansfield Avenue | Office Building
Related Party Transaction [Line Items]
Rentable area (square feet) | ft²				44,141		44,141
1015 N Mansfield Avenue | Corporate Joint Venture
Related Party Transaction [Line Items]
Purchase price	$ 18,000,000
Ownership Interest	28.80%
Percentage of ownership acquired	100.00%
Income from unconsolidated entities				$ (697,000)	(1,200,000)	$ (2,300,000)	(442,000)
1015 N Mansfield Avenue | Corporate Joint Venture | Office Building
Related Party Transaction [Line Items]
Area of land (square feet) | ft²	44,141
4750 Wilshire Boulevard
Related Party Transaction [Line Items]
Ownership Interest				20.00%		20.00%
4750 Wilshire Boulevard | Office Building
Related Party Transaction [Line Items]
Rentable area (square feet) | ft²		30,335		30,335		30,335
4750 Wilshire JV | Eleven Year Lease
Related Party Transaction [Line Items]
Ownership Interest									20.00%
4750 Wilshire JV | Corporate Joint Venture | Eleven Year Lease
Related Party Transaction [Line Items]
Income from unconsolidated entities				$ 85,000	$ 84,000	$ 251,000	$ 248,000

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