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NONCONTROLLING INTERESTS - Operating Partnership Ownership (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Partnership Ownership
OP units redeemed	105,757	126,087	475,046
CubeSmart, L.P. and Subsidiaries
Operating Partnership Ownership
Redemption value of OP units owned by third parties	$ 51.2
OP units outstanding (in shares)	1,194,705	1,300,462

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The number of units redeemed during the year of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

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-Topic 505
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Redemption value, as if currently redeemable, of redeemable noncontrolling interest classified as temporary equity and the election has been made to accrete changes in redemption value to the earliest redemption date.

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-Topic 480
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The number of units or equivalent units outstanding for all classes.

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-Section S99
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