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v3.24.3

Real Estate Assets - Additional Information (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 store | Sep. 30, 2024 USD ($) store | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) store | Sep. 30, 2023 USD ($)
Real Estate [Abstract] |  |  |  |  |
Number of stores with amended leases | 27 |  |  |  |
Number of stores with new triple-net lease agreement | 12 |  |  |  |
Number of operating stores held-for-sale | 17 | 17 |  | 17 |
Loss on real estate assets held for sale | $ |  | $ (8,961) | $ 0 | $ (63,620) | $ 0

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- Definition Gains losses on real estate transactions and earn out from prior acquisition and sales of other assets + References No definition available. + Details
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Namespace Prefix: | exr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Number Of Operating Stores Held For Sale + References No definition available. + Details
Name: | exr_NumberOfOperatingStoresHeldForSale
Namespace Prefix: | exr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number Of Stores With Amended Leases + References No definition available. + Details
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Namespace Prefix: | exr_
Data Type: | xbrli:integerItemType
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Period Type: | duration

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- Definition Number Of Stores With New Triple-Net Lease Agreements + References No definition available. + Details
Name: | exr_NumberOfStoresWithNewTripleNetLeaseAgreements
Namespace Prefix: | exr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration