Securitized Debt and Securitized Debt at Fair Value - Summary of Unamortized Discounts or Premiums (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Unamortized discounts (premiums)	$ 16,758	$ 21,527
2016-1 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)		(150)
2017-2 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	6	8
2018-1 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	3	6
2018-2 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	8	11
2019-1 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	6	9
2019-2 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	4	6
2019-3 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	3	4
2020-1 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	2	3
2020-2 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	294	786
2021-Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	11	15
2021-2 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	127	162
2021-3 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	473	660
2021-4 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	474	642
2022-1 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	2,622	3,546
2022-2 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	2,784	3,665
2022-MC1 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	189	388
2022-3 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	4,552	6,161
2022-4 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	3,689	4,878
2022-5 Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	544	$ 727
2023-1R Trust
Debt Instrument [Line Items]
Unamortized discounts (premiums)	$ 967