MEZZANINE EQUITY AND EQUITY - Narrative (Details)		3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) $ / shares	Mar. 31, 2025 USD ($) quarter $ / shares shares	Mar. 31, 2024 USD ($) shares	Sep. 30, 2024 $ / shares	Dec. 31, 2024 USD ($) $ / shares shares	Sep. 09, 2024 USD ($)	Sep. 08, 2024 USD ($)	Aug. 30, 2024 $ / shares shares	Mar. 10, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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
Noncontrolling interests , operating partnership, outstanding (in shares) | shares		972,000			980,000
Common shares of beneficial interest, shares outstanding (in shares) | shares		16,735,000			16,719,000
Share repurchase program, authorized amount									$ 50,000,000
Number of common shares (in shares) | shares		0
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						$ 500,000,000.0	$ 250,000,000.0
Aggregate gross sales price of common shares, remaining authorized amount		$ 262,900,000
2015 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards issued (in shares) | shares		7,818	3,742
Sale of common shares, net		$ 786,000	$ 445,000
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			$ 100
Distribution rate		3.862%
Units converted, ratio		1.37931
Preferred units, liquidation preference		$ 16,600,000
Series C Preferred Shares Of Beneficial Interest
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares redemption intended (in shares) | shares								3,900,000
Preferred shares, liquidation preference (in dollars per share) | $ / shares	$ 25			$ 25				$ 25
Payment for redemption of preferred stock	$ 97,000,000.0
Redemption of preferred shares	$ 3,500,000
Preferred shares of beneficial interest, shares outstanding (in shares) | shares		0			0
Preferred shares, annual distribution accrual rate (in dollars per share) | $ / shares				$ 1.65625
Preferred shares, dividend rate				6.625%
Series E Preferred Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred shares, dividend rate		3.875%
Preferred shares of beneficial interest, shares issued (in shares) | shares		1,600,000			1,600,000
Preferred units, par value (in dollars per share) | $ / shares		$ 100			$ 100
Preferred units, conversion ratio		1.20482
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 | quarter		3
Minimum distribution rate (in dollars per share) | $ / shares		$ 0.804
Preferred shares liquidation preference		$ 158,200,000			$ 158,200,000