DEBT - Narrative (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) apartmentCommunity loan	Dec. 31, 2022 USD ($) apartmentCommunity	Sep. 30, 2021 USD ($)	Jan. 31, 2021 USD ($)
Line of Credit Facility [Line Items]
Number of real estate properties, unencumbered by mortgages | apartmentCommunity	50
Revolving lines of credit	$ 143,469,000	$ 113,500,000
Outstanding debt	$ 921,659,000	$ 1,011,777,000
Weighted average interest rate	3.71%	3.62%
Line of Credit | Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.25%
Line of Credit | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.80%
Line of Credit | London Interbank Offered Rate (LIBOR) | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%
Line of Credit | London Interbank Offered Rate (LIBOR) | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.80%
Operating Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 6,000,000
Revolving lines of credit	4,000,000
BMO Line of Credit | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	250,000,000
Remaining borrowing capacity	110,500,000
Revolving lines of credit	139,500,000
Accordion option			$ 400,000,000
Unsecured Senior Notes | Private Shelf Agreement
Line of Credit Facility [Line Items]
Debt available for issuance	25,000,000			$ 225,000,000
Amount			25,000,000
Outstanding debt	$ 200,000,000
Unsecured Senior Notes | Note Purchase Agreement
Line of Credit Facility [Line Items]
Amount			125,000,000
Mortgages
Line of Credit Facility [Line Items]
Number of real estate properties, serving as collateral for mortgage loans | apartmentCommunity	13	15
Number of material defaults or instances of noncompliance | loan	0
Mortgages | Mortgages payable - Fannie Mae
Line of Credit Facility [Line Items]
Amount			$ 198,900,000
Outstanding debt	$ 198,850,000	$ 198,850,000
Weighted average interest rate	2.78%	2.78%
Mortgages | Mortgages payable - Fannie Mae | Interest Only Payment Date One
Line of Credit Facility [Line Items]
Term	7 years
Mortgages | Mortgages payable - Fannie Mae | Interest Only Payment Date Two
Line of Credit Facility [Line Items]
Term	10 years
Mortgages | Mortgages payable - Fannie Mae | Interest Only Payment Date Three
Line of Credit Facility [Line Items]
Term	12 years
Mortgages | Mortgages payable - Fannie Mae | 2021 Acquisitions
Line of Credit Facility [Line Items]
Number of apartment units | apartmentCommunity	12