Fair Value of Financial Instruments - Recurring Fair Value (Details) - Level III - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment	$ 570,780	$ 91,879
Secured Financing Facilities	339,627	0
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment	597,669	91,879
Secured Financing Facilities	$ 341,679	$ 0