Investments in Unconsolidated Entities Schedule of Ownership of Investments in Unconsolidated Entities (Details)	Mar. 31, 2023	Dec. 31, 2022
LendSure Mortgage Corp [Member] | Voting ownership
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	49.90%	49.90%
LendSure Mortgage Corp [Member] | Nonvoting Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	13.80%
LendSure Mortgage Corp [Member] | Nonvoting Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		13.80%
Jepson Holdings Limited | Voting ownership
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	1.80%	1.90%
Elizon DB 2015-1 LLC [Member]
Schedule of Equity Method Investments [Line Items]
Effective Ownership Percentage	56.70%	62.40%
Elizon DB 2015-1 LLC [Member] | Voting ownership
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	17.10%	14.60%
Elizon NM CRE 2020-1 LLC
Schedule of Equity Method Investments [Line Items]
Effective Ownership Percentage	63.10%	54.20%
Elizon NM CRE 2020-1 LLC | Voting ownership
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	15.90%	20.20%
Elizon CH CRE 2020-1 LLC
Schedule of Equity Method Investments [Line Items]
Effective Ownership Percentage	56.00%	57.40%
Elizon CH CRE 2020-1 LLC | Voting ownership
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	30.30%	34.20%
Elizon NAT CRE 2020-1 LLC
Schedule of Equity Method Investments [Line Items]
Effective Ownership Percentage	60.60%	66.60%
Elizon NAT CRE 2020-1 LLC | Voting ownership
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	12.20%	15.50%
Minimum | Other Equity Method Investments [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	6.10%	9.90%
Minimum | Loan Originator - Other
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	24.70%	24.70%
Minimum | Equity investments in securitization-related risk retention vehicles
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	24.60%	24.60%
Maximum | Other Equity Method Investments [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	79.00%	79.00%
Maximum | Loan Originator - Other
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%	80.00%
Maximum | Equity investments in securitization-related risk retention vehicles
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	84.50%	56.30%