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CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (LP cube) - $ / shares	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2019
Cubesmart, L P and Subsidiaries
Common OP unit distributions (in dollars per share)	$ 0.34	$ 0.33	$ 0.34	$ 0.33

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- Definition

The amount of the distribution per unit of limited partner interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

+ Details

Name:	us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=cube_CubesmartLPAndSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: