Repurchase Agreements, Loan Participations Sold, Notes Payable and Secured Term Loan, Net - Summary of Secured Term Loan (Details) - USD ($)	1 Months Ended		12 Months Ended
	Jan. 31, 2022	Jun. 02, 2021	Dec. 31, 2021		Dec. 31, 2020
Secured Term Loan [Line Items]
Contractual Maturity Date	Jul. 05, 2022	Feb. 09, 2024
Outstanding principal balance					$ 500,000,000
Carrying value			$ 167,744,000	[1]	$ 516,484,000	[2]
Secured Term Loan
Secured Term Loan [Line Items]
Contractual Maturity Date			Aug. 09, 2026		Aug. 09, 2026
Stated			S + 4.50%	[3]	L + 5.00%	[4]
Debt Instrument Interest Rate			5.00%		6.00%
Outstanding principal balance			$ 762,717,000		$ 768,554,000
Carrying value			$ 739,762,000		$ 746,095,000

[1] This financing has a LIBOR floor of 1.85%.

[2] Weighted average interest rate as of December 31, 2020 was 5.09%. Weighted average is based on outstanding principal as of December 31, 2020.

[3] One-month SOFR at December 31, 2021 was 0.05%. Following the modification on December 1, 2021, the secured term loan has a floor equal to the greater of one-month SOFR plus 0.10%, and 0.50%.

[4] One-month LIBOR at December 31, 2020 was 0.14%. The secured term loan has a LIBOR floor of 1.00%.