Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Parenthetical) (Detail) - Canadian Entities - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Income Tax [Line Items]
Real estate basis differences	$ 1.4	$ 1.1
Non-capital loss carryforwards	5.2	5.5
Non-deductible interest expense carry-forwards	$ 2.0	$ 1.1

Deferred tax assets, non deductible interest expense carryforwards.

No definition available.

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Namespace Prefix:	ck0001585389_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant