Fair Value Measurement - Sensitivity of Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans (at fair value)
Discount rates
100 basis point increase	$ (8,482)	$ (3,392)
200 basis point increase	(16,793)	(6,709)
Expected credit loss rates on underlying loans
10% adverse change	(8,691)	(3,959)
20% adverse change	(17,386)	(7,927)
Expected prepayment rates
10% adverse change	(1,638)	(239)
20% adverse change	(3,277)	(512)
Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Aggregate fair value of loans purchased and held by UAWT	700,455	252,477
Fair Value, Inputs, Level 3 | Loans (at fair value)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Aggregate fair value of loans purchased and held by UAWT	$ 700,455	$ 252,477