Summary of Significant Accounting Policies - Schedule of Incentive Compensation Awards Issued to Simply Self Storage and HPA Employees (Details) $ in Thousands	9 Months Ended
Sep. 30, 2025 USD ($)
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	$ 62,724
Value of Awards Issued	76,634
Forfeiture of Unvested Awards	(7,201)
Amortization of Compensation Cost	(41,743)
Unrecognized Compensation Cost, ending balance	90,414
Simply Self Storage and Home Partners of America
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	20,869
Value of Awards Issued	17,022
Forfeiture of Unvested Awards	(6,540)
Amortization of Compensation Cost	(11,013)
Unrecognized Compensation Cost, ending balance	20,338
2022
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	7,786
Value of Awards Issued	0
Forfeiture of Unvested Awards	(86)
Amortization of Compensation Cost	(5,868)
Unrecognized Compensation Cost, ending balance	$ 1,832
Remaining Amortization Period	3 months 18 days
2022 \| Simply Self Storage and Home Partners of America
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	$ 3,107
Value of Awards Issued	0
Forfeiture of Unvested Awards	(1,467)
Amortization of Compensation Cost	(1,506)
Unrecognized Compensation Cost, ending balance	$ 134
Remaining Amortization Period	3 months 18 days
2023
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	$ 14,673
Value of Awards Issued	0
Forfeiture of Unvested Awards	(4,591)
Amortization of Compensation Cost	(3,100)
Unrecognized Compensation Cost, ending balance	$ 6,982
Remaining Amortization Period	1 year 1 month 6 days
2023 \| Simply Self Storage and Home Partners of America
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	$ 6,070
Value of Awards Issued	0
Forfeiture of Unvested Awards	(613)
Amortization of Compensation Cost	(3,473)
Unrecognized Compensation Cost, ending balance	$ 1,984
Remaining Amortization Period	1 year 1 month 6 days
2024
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	$ 40,265
Value of Awards Issued	0
Forfeiture of Unvested Awards	(2,524)
Amortization of Compensation Cost	(13,617)
Unrecognized Compensation Cost, ending balance	$ 24,124
Remaining Amortization Period	1 year 10 months 24 days
2024 \| Simply Self Storage and Home Partners of America
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	$ 11,692
Value of Awards Issued	0
Forfeiture of Unvested Awards	(3,597)
Amortization of Compensation Cost	(2,078)
Unrecognized Compensation Cost, ending balance	$ 6,017
Remaining Amortization Period	1 year 10 months 24 days
2025
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	$ 0
Value of Awards Issued	76,634
Forfeiture of Unvested Awards	0
Amortization of Compensation Cost	(19,158)
Unrecognized Compensation Cost, ending balance	$ 57,476
Remaining Amortization Period	2 years 7 months 6 days
2025 \| Simply Self Storage and Home Partners of America
Incentive Compensation Awards [Roll Forward]
Unrecognized Compensation Cost, beginning balance	$ 0
Value of Awards Issued	17,022
Forfeiture of Unvested Awards	(863)
Amortization of Compensation Cost	(3,956)
Unrecognized Compensation Cost, ending balance	$ 12,203
Remaining Amortization Period	2 years 7 months 6 days

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Amount of cost capitalized for award under share-based payment arrangement.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Value of forfeited shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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