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Related Party Transactions - Summary of Related Party Carrying Value of Investments In Advances (Parenthetical) (Detail) - USD ($)		3 Months Ended
	May 02, 2023	Mar. 31, 2023	Mar. 31, 2022	May 31, 2023	Dec. 31, 2022	Oct. 07, 2021
Related Party Transaction [Line Items]
Principal borrowing amount						$ 700,000,000
Outstanding principal, plus accrued interest		$ 12,016,875	$ 0
SST VI | Subsequent Event
Related Party Transaction [Line Items]
Outstanding principal, plus accrued interest	$ 51,700,000
Series A Cumulative Preferred Stock | Subsequent Event
Related Party Transaction [Line Items]
Preferred stock shares redeemed				600,000
Series A Cumulative Preferred Stock | SST VI OP | Subsequent Event
Related Party Transaction [Line Items]
Preferred stock shares redeemed	600,000
Interest payable	$ 15,100,000
SSGT III Mezzanine Loan
Related Party Transaction [Line Items]
Principal borrowing amount		17,500,000			$ 17,500,000
SST VI Mezzanine Loan
Related Party Transaction [Line Items]
Principal borrowing amount		$ 5,000,000.0			$ 20,000,000.0

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Amount of interest payable on debt, including, but not limited to, trade payables.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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