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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) $ in Thousands		1 Months Ended		3 Months Ended		9 Months Ended
	Jan. 31, 2024 USD ($) unit	Aug. 31, 2024 USD ($)	Jan. 31, 2024 USD ($) unit	Sep. 30, 2024 USD ($) jointVenture shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) jointVenture shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) shares
Noncontrolling Interest [Line Items]
Investment in short-term deposits		$ 350,000	$ 265,000			$ 615,000	$ 0
Short-term deposits, interest rate (as a percent)	5.34%	5.05%	5.34%
Interest income				$ 2,200		$ 6,300
Variable interest entity, number of entities | jointVenture				2		2
Assets of VIEs				$ 7,129,734		$ 7,129,734		$ 6,944,078
Number of investments in unconsolidated joint ventures | jointVenture				4		4
Gain on sale						$ (864)	22,468
Gain on sale of unconsolidated property				$ 0	$ 0	2,325	0
Distribution from unconsolidated joint venture						$ 1,618	$ 0
Limited partners' capital account, units outstanding (in shares) | shares				3,960,037		3,960,037		3,512,868
Glendale Center Apartments
Noncontrolling Interest [Line Items]
Ownership percentage in equity method investment (as a percent)	11.50%		11.50%
Gain on sale	$ 20,200
Gain on sale of unconsolidated property						$ 2,300
Distribution from unconsolidated joint venture						$ 1,600
Glendale Center Apartments | Multifamily
Noncontrolling Interest [Line Items]
Number of multifamily rental units | unit	267		267
One Loudoun Downtown - Pads G & H
Noncontrolling Interest [Line Items]
Noncontrolling interest, ownership percentage by parent (as a percent)				90.00%		90.00%
Operating Partnership
Noncontrolling Interest [Line Items]
Noncontrolling interest, ownership percentage by parent (as a percent)				98.20%		98.20%		98.40%
Noncontrolling interest, ownership percentage by limited partners (as a percent)				1.80%		1.80%		1.60%
Variable Interest Entities
Noncontrolling Interest [Line Items]
Mortgage debt of VIEs				$ 110,300		$ 110,300
Assets of VIEs				$ 218,100		$ 218,100

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