SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) segment investment variableInterestEntity	Dec. 31, 2022 USD ($) investment	Dec. 31, 2021 USD ($)
Accounting Policies [Line Items]
Number of investments in loans accounted for as real estate joint ventures | investment	0	0
Gain on business interruption insurance recovery, statement of income or comprehensive income	Other income (expense)
Assets held for sale	$ 0	$ 0
Restricted cash	5,434,000	4,624,000
Restricted cash obligations	1,400,000	3,900,000
Operating lease right-of-use asset	11,600,000	8,500,000
Operating lease liability	$ 12,488,000	$ 9,200,000
Operating lease, liability, statement of financial position	Accounts payable and accrued liabilities	Accounts payable and accrued liabilities
Operating lease, right-of-use asset, statement of financial position	Accounts receivable, prepaid expenses and other assets, net	Accounts receivable, prepaid expenses and other assets, net
Operating lease, expense	$ 1,400,000	$ 1,200,000	$ 1,200,000
Weighted-average remaining term of operating leases	17 years
Weighted average discount rate	8.00%
Number of reportable segments | segment	1
Vandalism And Theft
Accounting Policies [Line Items]
Proceeds of insurance	$ 6,200,000
Gain of unusual amount	3,700,000
Fire
Accounting Policies [Line Items]
Proceeds of insurance	1,100,000
Gain of unusual amount	500,000
Resident fee and services
Accounting Policies [Line Items]
Grants recognized	100,000	$ 100,000	$ 500,000
Loss from unconsolidated joint venture
Accounting Policies [Line Items]
Grants recognized	$ 3,600,000
Minimum | Land improvements
Accounting Policies [Line Items]
Estimated useful lives of assets	15 years
Minimum | Buildings and building improvements
Accounting Policies [Line Items]
Estimated useful lives of assets	5 years
Minimum | Furniture and equipment
Accounting Policies [Line Items]
Estimated useful lives of assets	3 years
Maximum | Land improvements
Accounting Policies [Line Items]
Estimated useful lives of assets	20 years
Maximum | Buildings and building improvements
Accounting Policies [Line Items]
Estimated useful lives of assets	45 years
Maximum | Furniture and equipment
Accounting Policies [Line Items]
Estimated useful lives of assets	10 years
Primary beneficiary
Accounting Policies [Line Items]
Number of variable interest entities | variableInterestEntity	0