SEGMENTS - Segment Assets and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Segment Reporting Information [Line Items]
Property owned	$ 2,513,470	$ 2,271,170
Less accumulated depreciation	(511,000)	(443,592)
Total property owned	2,002,470	1,827,578
Mortgage loans receivable	0	43,276
Cash and cash equivalents	14,957	31,267	$ 20,816
Restricted cash	1,417	7,358	$ 2,376
Other assets	19,742	30,582
Total Assets	2,038,586	1,940,061
Multifamily
Segment Reporting Information [Line Items]
Property owned	2,486,836	2,244,250
Less accumulated depreciation	(503,038)	(436,004)
Total property owned	1,983,798	1,808,246
All Other
Segment Reporting Information [Line Items]
Property owned	26,634	26,920
Less accumulated depreciation	(7,962)	(7,588)
Total property owned	$ 18,672	$ 19,332