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NONCONTROLLING INTERESTS - Operating Partnership Ownership (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2022
Operating Partnership Ownership
OP Units outstanding which are not owned by the general partner (as a percent)	0.60%						0.60%
OP units outstanding (in shares)	1,360,549			1,460,520			1,426,549
Adjustment for noncontrolling interests in the Operating Partnership	$ 9,035	$ 2,134	$ (8,588)	$ 3,990	$ 13,349	$ 10,356
CubeSmart, L.P. and Subsidiaries
Operating Partnership Ownership
Adjustment for noncontrolling interests in the Operating Partnership	$ 9,035	$ 2,134	$ (8,588)	$ 3,990	$ 13,349	$ 10,356

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- Definition

Represents the percentage of ownership in operating partnership not owned by the general partner.

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- Definition

Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Subparagraph 14
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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

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