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NONCONTROLLING INTERESTS - Operating Partnership Ownership (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Partnership Ownership
OP units redeemed	126,087	475,046	5,519,233
CubeSmart, L.P. and Subsidiaries
Operating Partnership Ownership
OP units outstanding (in shares)	1,300,462	1,426,549
OP Units, redemption value	$ 60.3

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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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The number of units or equivalent units outstanding for all classes.

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