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Related Party Transactions (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($) storage_facility adult_children	Sep. 30, 2022 USD ($)
Related Party Transaction [Line Items]
Tenants reinsurance premiums earned by subsidiaries		$ 1.7
Premium Payments
Related Party Transaction [Line Items]
Tenants reinsurance premiums earned by subsidiaries	$ 1.6
Hughes Owned Canadian Facilities | Canada | Related Party
Related Party Transaction [Line Items]
Number of self-storage facilities | storage_facility	65
Number of Ms. Gustavson's adult children owning remaining equity in LLC | adult_children	2
Ownership interest by parent	0.00%
Tamara Hughes Gustavson | Hughes Owned Canadian Facilities | Canada | Related Party
Related Party Transaction [Line Items]
Ownership interest of noncontrolling owners (less than)	0.10%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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