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EARNINGS PER SHARE AND UNIT AND SHAREHOLDERS' EQUITY AND CAPITAL - Summary of OP and Common Units (Details) - shares	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
General partner
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding OP units	227,764,975	224,921,053	224,603,462
Related Party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding OP units	1,194,705	1,300,462	1,426,549
CubeSmart, L.P. and Subsidiaries
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding OP units	1,194,705	1,300,462

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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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5

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