Repurchase Agreements, Loan Participations Sold, Net, Notes Payable, Net, Secured Term Loan, Net, Debt Related to Real Estate Owned, Net, and Acquisition Facility- Summary of Liability Under Repurchase Agreements (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2022		Dec. 31, 2021
Repurchase Agreement Counterparty [Line Items]
Carrying Value	$ 273,487		$ 167,744
Loan held by company	$ 628,327	[1]	$ 420,844
Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Weighted Average Term	2 years 1 month 6 days	[2]	1 year 10 months 24 days	[3]
Borrowing Outstanding	$ 3,918,703		$ 3,489,511
Carrying Value	3,918,703		3,489,511
Loan held by company	$ 5,729,892		$ 5,336,756
JP Morgan Chase Bank NA Main Pool [Member] | Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Weighted Average Term	2 years 4 months 24 days	[2]	1 year 7 months 6 days	[3]
Borrowing Outstanding	$ 1,355,946		$ 1,173,280
Carrying Value	1,355,946		1,173,280
Loan held by company	$ 1,851,860		$ 1,626,719
JP Morgan Chase Bank NA Side Car [Member] | Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Weighted Average Term	8 months 12 days	[2]	10 months 24 days	[3]
Borrowing Outstanding	$ 215,397		$ 215,003
Carrying Value	215,397		215,003
Loan held by company	$ 451,048		$ 436,325
Morgan Stanley Bank NA [Member] | Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Weighted Average Term	2 years 1 month 6 days	[2]	2 years 4 months 24 days	[3]
Borrowing Outstanding	$ 840,996		$ 1,000,000
Carrying Value	840,996		1,000,000
Loan held by company	$ 1,298,072		$ 1,709,758
Goldman Sachs Bank USA [Member] | Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Weighted Average Term	1 year 3 months 18 days	[2]	1 year 3 months 18 days	[3]
Borrowing Outstanding	$ 393,398		$ 410,551
Carrying Value	393,398		410,551
Loan held by company	$ 578,900		$ 589,825
Barclays Bank PLC [Member] | Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Weighted Average Term	1 year 4 months 24 days	[2]	1 year 4 months 24 days	[3]
Borrowing Outstanding	$ 186,383		$ 193,884
Carrying Value	186,383		193,884
Loan held by company	$ 285,166		$ 283,716
Deutsche Bank AG New York Branch [Member] | Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Weighted Average Term	1 year 9 months 18 days	[2]	2 years 3 months 18 days	[3]
Borrowing Outstanding	$ 222,583		$ 211,372
Carrying Value	222,583		211,372
Loan held by company	$ 352,989		$ 327,671
Wells Fargo Bank NA [Member] | Repurchase Agreements
Repurchase Agreement Counterparty [Line Items]
Weighted Average Term	2 years 7 months 6 days	[2]	2 years 9 months 18 days	[3]
Borrowing Outstanding	$ 704,000		$ 285,421
Carrying Value	704,000		285,421
Loan held by company	$ 911,857		$ 362,742

[1] Includes all cash reserve balances held by the servicer.

[2] The weighted average term (years) is determined based on the contractual initial maturity date of the corresponding loans collateralizing each facility. Weighted average is based on borrowing outstanding as of June 30, 2022.

[3] The weighted average term (years) is determined based on the contractual initial maturity date of the corresponding loans collateralizing each facility. Weighted average is based on borrowing outstanding as of December 31, 2021.