Name:	cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold
Namespace Prefix:	cube_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the number of real estate properties that were acquired.

No definition available.

Name:	cube_NumberOfRealEstatePropertiesAcquired
Namespace Prefix:	cube_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-13

Name:	us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

Name:	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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.

No definition available.

Name:	us-gaap_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=cube_RealEstateAcquisitions2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	cube_ScheduleOfRealEstateInvestmentPropertyAxis=cube_NewJerseyAssetDecember2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=cube_RealEstateAcquisitions2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	cube_ScheduleOfRealEstateInvestmentPropertyAxis=cube_ConnecticutAssetsJanuary2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=cube_Dispositions2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	cube_ScheduleOfRealEstateInvestmentPropertyAxis=cube_IllinoisAssetDecember2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: