EQUITY AND MEZZANINE EQUITY - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) qtr $ / shares shares	Mar. 31, 2023 USD ($) shares	Dec. 31, 2023 USD ($) $ / shares shares	Mar. 10, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Noncontrolling interests , operating partnership, outstanding (in shares) | shares	844,000		861,000
Preferred shares, shares issued (in shares) | shares	3,881,000		3,881,000
Preferred shares liquidation preference	$ 97,036,000		$ 97,036,000
Common stock outstanding (in shares) | shares	14,912,000		14,963,000
Share repurchase program, authorized amount				$ 50,000,000
Remaining authorized repurchase amount	$ 4,700,000
Preferred shares of beneficial interest, shares outstanding (in shares) | shares	3,881,000		3,881,000
Preferred shares, liquidation preference (in dollars per share) | $ / shares	$ 25		$ 25
Preferred units, shares issued (in shares) | shares	166,000		166,000
Preferred units, par value (in dollars per share) | $ / shares	$ 100		$ 100
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]
Sale of common shares, net	0	$ 0
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
2015 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued (in shares) | shares	3,742	11,877
Sale of common shares, net	$ 445,000	$ 1,100,000
Series E Preferred Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred shares, shares issued (in shares) | shares	1,700,000
Preferred units, par value (in dollars per share) | $ / shares	$ 100		$ 100
Preferred shares, dividend 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	$ 171,200,000
Series C Preferred Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred shares, dividend rate	6.625%
Preferred shares liquidation preference	$ 97,000,000
Preferred shares of beneficial interest, shares outstanding (in shares) | shares	3,900,000		3,900,000
Preferred shares, liquidation preference (in dollars per share) | $ / shares	$ 25.00
Preferred shares, annual 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, par value (in dollars per share) | $ / shares	$ 100
Distribution rate	3.862%
Units converted, ratio	1.37931
Preferred units, liquidation preference	$ 16,600,000