EQUITY AND MEZZANINE EQUITY - Narrative (Details)			12 Months Ended
	Sep. 01, 2021 qtr apartmentUnit $ / shares shares	Oct. 02, 2017 $ / shares shares	Dec. 31, 2022 USD ($) apartmentCommunity $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($)	Dec. 31, 2022 shares	Dec. 31, 2022 USD ($)	Dec. 31, 2022 apartmentCommunity	Dec. 31, 2022 apartmentProperty	Mar. 10, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Noncontrolling interests - operating partnership (in shares) | shares				832,000		971,000
Noncontrolling interests , operating partnership, issued (in shares) | shares			209,000
Preferred units, shares issued (in shares) | shares				3,881,000		3,881,000
Number of properties								84	37
Preferred shares, liquidation preference | $				$ 97,036,000			$ 97,036,000
Common shares outstanding (in shares) | shares				15,016,000		15,020,000
Sale of common shares, net | $			$ 31,439,000	$ 156,038,000	$ 58,852,000
Aggregate gross sales price of common share of beneficial interest allowed to be repurchased | $										$ 50,000,000
Remaining available repurchase amount | $							21,000,000
Preferred shares of beneficial interest, shares outstanding (in shares) | shares				3,881,000		3,881,000
Preferred units, shares issued (in shares) | shares				166,000		166,000
Preferred units, liquidation preference | $				$ 16,560,000			16,560,000
At-The-Market Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate gross sales price of common shares, authorized amount | $							250,000,000
Aggregate gross sales price of common shares, remaining authorized amount | $							126,600,000
Incentive Plan 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares forfeited (in shares) | shares			2,000	500
Performance Shares | Incentive Plan 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued (in shares) | shares			24,613	27,351
Sale of common shares, net | $			$ 1,300,000	$ 1,000,000
Series C Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution rate			6.625%
Preferred shares, liquidation preference | $				$ 97,000,000			97,000,000
Preferred shares of beneficial interest, shares outstanding (in shares) | shares		4,100,000
Liquidation preference per share (in dollars per share) | $ / shares		$ 25.00
Distribution accrual rate (in dollars per share) | $ / shares		$ 1.65625
Series D Preferred Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred units, shares issued (in shares) | shares				165,600		165,600
Preferred units, issuance price (in dollars per share) | $ / shares			$ 100	$ 100
Temporary equity, distribution rate			3.862%
Conversion ratio			1.37931
Preferred units, liquidation preference | $							16,600,000
Series E Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred units, shares issued (in shares) | shares	1,800,000
Preferred units, par value (in dollars per share) | $ / shares	$ 100
Distribution rate	3.875%
Preferred units, conversion ratio	1.2048
Preferred units, conversion exchange rate, minimum threshold (in dollars per share) | $ / shares	$ 83
Preferred stock, threshold trading days	15 days
Preferred stock, threshold consecutive trading days	30 days
Number of consecutive distribution periods | qtr	3
Minimum distribution rate (in dollars per share) | $ / shares	$ 0.804
Preferred shares, liquidation preference | $							$ 175,800,000
2022 Acquisitions, Three Apartment Communities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of apartment communities acquired | apartmentCommunity			3
2021 Acquisitions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of properties | apartmentUnit	17