Consolidation of Variable Interest Entities - Schedule of Carrying Values of Assets and Liabilities of Consolidated VIE, Net of Elimination Entries (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Variable Interest Entity [Line Items]    
Restricted cash of consolidated VIE $ 1,132  
Mortgage loans of consolidated VIE, at fair value 29,697 $ 45,000
Other assets of consolidated VIE 15,037 20,691
Other liabilities of consolidated VIE (6,377) (5,019)
Variable Interest Entity, Primary Beneficiary    
Variable Interest Entity [Line Items]    
Cash of consolidated VIE 2,118  
Restricted cash of consolidated VIE [1] 111 11,169
Mortgage loans of consolidated VIE, at fair value 7,442 93,283
Other assets of consolidated VIE 547 545
Secured debt, at fair value (508) (93,627)
Other liabilities of consolidated VIE (2) (321)
Investment in consolidated VIE $ 9,708 $ 11,049
[1] Restricted cash represents cash collected by the trust that must be used solely to satisfy the liabilities of the VIE in the month following collection