Repurchase Agreements, Loan Participations Sold, Notes Payable and Secured Term Loan, Net - Summary of Notes Payable (Parenthetical) (Details) - USD ($) $ in Thousands					1 Months Ended		12 Months Ended
	May 27, 2021	Mar. 12, 2021	Jan. 31, 2021	Jan. 05, 2021	Jan. 31, 2022	Jun. 02, 2021	Dec. 31, 2021		Dec. 31, 2020
Debt Instrument [Line Items]
Weighted Average Interest Rate(4)							5.40%	[1]	6.57%	[2]
LIBOR floor							0.25%		0.35%
LIBOR floor	0.35%
Contractual Maturity Date					Jul. 05, 2022	Feb. 09, 2024
Maximum Extension Date					Jan. 04, 2023
Notes payable, net							$ 48,000		$ 303,515
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Weighted Average Interest Rate(4)							2.16%		2.17%
LIBOR floor							0.10%		0.14%
Notes Payable [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate(4)									3.44%
LIBOR floor									0.14%
Contractual Maturity Date		Oct. 01, 2021					Jan. 04, 2022	[3],[4]
Maximum Extension Date		Jan. 04, 2022	Jul. 30, 2021	Apr. 01, 2021			Jan. 04, 2022	[3],[4]
Notes Payable [Member] | Maximum
Debt Instrument [Line Items]
Notes payable, net									$ 20,000
Notes Payable [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Weighted Average Interest Rate(4)							4.00%
LIBOR floor							0.10%
LIBOR floor							2.43%

[1] Reflects the weighted average interest rate based on the applicable floating benchmark rate (if applicable), including LIBOR floors (if applicable). Weighted average is based on outstanding principal as of December 31, 2021.

[2] Reflects the weighted average interest rate based on the applicable floating benchmark rate (if applicable), including LIBOR floors (if applicable). Weighted average is based on outstanding principal as of December 31, 2020.

[3] Weighted average interest rate as of December 31, 2021 was LIBOR plus 4.00%. One-month LIBOR as of December 31, 2021 was 0.10%. This financing has a LIBOR floor of 2.43%. Weighted average is based on outstanding principal as of December 31, 2021.

[4] In January 2022, the initial maturity was extended to July 5, 2022 and the maximum maturity date was extended to January 4, 2023.