SUBSEQUENT EVENTS (Details) $ in Millions	Jul. 30, 2024 USD ($) property	Jul. 29, 2024 USD ($)	Jul. 01, 2024 USD ($) shares	Jun. 30, 2024 property
Subsequent Event [Line Items]
Number of self storage properties | property				1,052
Subsequent Event
Subsequent Event [Line Items]
Consideration for internalization of PRO structure			$ 34.6
Merger and internalization of PRO, net of issuance costs (in shares) | shares			775,210
Cash payment			$ 3.4
Consideration paid for PRO rights			$ 60.3
Redemptions/conversions of units (in shares) | shares			11,906,167
Consideration for PRO rights, cash payments			$ 29.2
Issuance of preferred shares (in shares) | shares			17,984,787
Time frame prior to conversion for conversion metric (in years)			1 year
Percentage of cash available for distribution used in conversion ratio calculation			110.00%
Subsequent Event | OP Units
Subsequent Event [Line Items]
Redemptions/conversions of units (in shares) | shares			773,656
Subsequent Event | Mark Van Mourick
Subsequent Event [Line Items]
Consideration for PRO rights, cash payments			$ 2.9
Subsequent Event | Mark Van Mourick | OP Units
Subsequent Event [Line Items]
Redemptions/conversions of units (in shares) | shares			209,333
Consideration for PRO rights, cash payments			$ 8.4
Subsequent Event | Arlen Nordhagen
Subsequent Event [Line Items]
Conversion of units (in shares) | shares			64,887
Conversion of Stock, Amount Converted			$ 2.6
Subsequent Event | Term Loan B
Subsequent Event [Line Items]
Repayments of Debt		$ 145.0
Subsequent Event | 2023 Joint Venture Acquisitions
Subsequent Event [Line Items]
Number of self storage properties | property	5
Payments to acquire joint venture	$ 71.9
Real estate investments, joint ventures	$ 18.0