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NONCONTROLLING INTERESTS - Operating Partnership Ownership (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2021
Operating Partnership Ownership
OP Units outstanding which are not owned by the general partner (as a percent)	0.60%				0.80%
OP units outstanding (in shares)	1,460,520		7,284,506		1,901,595
Adjustment for noncontrolling interests in the Operating Partnership	$ 13,349	$ 10,356	$ (63,025)	$ (32,102)
CubeSmart, L.P. and Subsidiaries
Operating Partnership Ownership
Adjustment for noncontrolling interests in the Operating Partnership	$ 13,349	$ 10,356	$ (63,025)	$ (32,102)

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- Definition

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

+ References

No definition available.

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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

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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.

+ References

No definition available.

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- Definition

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

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-Topic 505
-SubTopic 10
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