Commercial Mortgage Loans Held for Investment - Schedule of Commercial Mortgage Loans held for Investment (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022 USD ($) Loan	Dec. 31, 2021 USD ($) Loan	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Mortgage Loans On Real Estate [Line Items]
Number of Loans | Loan	42	38
Principal Balance	$ 815,702	$ 664,170
Unamortized (fees)/costs, net	1,392	1,328
Carrying Value	$ 817,094	$ 665,498	$ 665,498	$ 441,814
Weighted Average Interest Rate	6.30%	4.60%
Weighted Average Years to Maturity	1 year 7 months 6 days	1 year 8 months 12 days
First Mortgage Loans [Member]
Mortgage Loans On Real Estate [Line Items]
Number of Loans | Loan	40	36
Principal Balance	$ 802,202	$ 650,670
Unamortized (fees)/costs, net	1,392	1,328
Carrying Value	$ 803,594	$ 651,998
Weighted Average Interest Rate	6.20%	4.50%
Weighted Average Years to Maturity	1 year 7 months 6 days	1 year 7 months 6 days
Credit Loans [Member]
Mortgage Loans On Real Estate [Line Items]
Number of Loans | Loan	2	2
Principal Balance	$ 13,500	$ 13,500
Carrying Value	$ 13,500	$ 13,500
Weighted Average Interest Rate	9.60%	9.60%
Weighted Average Years to Maturity	3 years 8 months 12 days	4 years 4 months 24 days