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Core earnings.

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Offering costs.

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Related Party Transactions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		6 Months Ended		104 Months Ended
	Mar. 11, 2025	Dec. 01, 2022	Dec. 31, 2016	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Dec. 31, 2024
Related Party Transaction [Line Items]
Offering costs incurred								$ 28,854
Due to related party				$ 94,116		$ 94,116		$ 94,116	$ 100,772
Related Party
Related Party Transaction [Line Items]
Percentage of origination fees of loan amount						1.00%
Related Party \| Maximum
Related Party Transaction [Line Items]
Public offering				15.00%		15.00%		15.00%
FS Real Estate Advisor or Rialto \| Related Party
Related Party Transaction [Line Items]
Origination fees				$ 3,147	$ 3,393	$ 6,820	$ 5,763
FS Real Estate Advisor or Rialto \| Related Party \| Class I Share Performance-contingent Rights Agreement \| Performance-Contingent Rights (PCRs)
Related Party Transaction [Line Items]
Annualized distribution yield						6.00%
Agreement period						6 months
Period of written notice to the company by the adviser entities						10 days
FS Real Estate Advisor or Rialto \| Related Party \| Class I Restricted Stock Units Sub Advisory Agreement \| Restricted Stock Units (RSUs)
Related Party Transaction [Line Items]
Agreement period		6 months
Period of written notice to the company by the adviser entities		10 days
Award vesting rights, percentage		100.00%
Award non vesting rights, percentage		100.00%
Award vesting period	4 years
FS Real Estate Advisor \| Related Party
Related Party Transaction [Line Items]
Base management fee percentage		1.25%
Performance fee percentage						10.00%
Hurdle rate on average adjusted capital						1.625%
Annualized hurdle rate						6.50%
Quarterly core earnings rate						1.806%
Annualized core earnings rate						7.222%
Performance fee percentage				10.00%		10.00%		10.00%
Administrative service fee percentage		1.00%				1.00%
Public offering				0.75%		0.75%		0.75%
Offering costs previously funded						$ 1,659
Due to related party				$ 3,592		$ 3,592		$ 3,592
Stockholder servicing fees percentage				10.00%		10.00%		10.00%
Investments owned				$ 14,445		$ 14,445		$ 14,445
FS Real Estate Advisor \| Related Party \| Expense Limitation
Related Party Transaction [Line Items]
Percentage of minimum operating expenses to be waived or paid						1.50%
FS Real Estate Advisor \| Related Party \| Maximum \| Expense Limitation
Related Party Transaction [Line Items]
Period for which reimbursement payable						3 years
FS Real Estate Advisor \| Related Party \| Common Stock Class D
Related Party Transaction [Line Items]
Stockholders servicing fee percentage on aggregate NAV of outstanding shares						0.30%
Stockholder servicing fees percentage				1.25%		1.25%		1.25%
FS Real Estate Advisor \| Related Party \| Common Stock Class M
Related Party Transaction [Line Items]
Stockholders servicing fee percentage on aggregate NAV of outstanding shares						0.30%
Stockholder servicing fees percentage				7.25%		7.25%		7.25%
FS Real Estate Advisor \| Related Party \| Common Stock Class S
Related Party Transaction [Line Items]
Dealer manager upfront selling commissions fees percentage						3.50%
Stockholders servicing fee percentage on aggregate NAV of outstanding shares						0.85%
Stockholder servicing fees percentage				8.75%		8.75%		8.75%
FS Real Estate Advisor \| Related Party \| Common Stock Class T
Related Party Transaction [Line Items]
Dealer manager upfront selling commissions fees percentage						3.00%
Upfront dealer manager fees percentage						0.50%
Selling commission and fee maximum percent						3.50%
Stockholders servicing fee percentage on aggregate NAV of outstanding shares						0.85%
Advisor stockholders servicing fee percentage on aggregate NAV of outstanding shares						0.65%
Dealer stockholders servicing fee percentage on aggregate NAV of outstanding shares						0.20%
Stockholder servicing fees percentage				8.75%		8.75%		8.75%
Rialto \| Related Party
Related Party Transaction [Line Items]
Valuation fee, per valuation						$ 1
Investments owned				$ 454		454		$ 454
FS Investment Solutions \| Related Party
Related Party Transaction [Line Items]
Due to related party				$ 94,116		$ 94,116		$ 94,116	$ 100,772
Principals of FS Investments \| Related Party \| Private Placement
Related Party Transaction [Line Items]
Aggregate proceeds from private placement			$ 200
Issuance of common stock (in shares)			8,000
Common stock, price per share (in dollars per share)			$ 25.00