v3.26.1
Loans Held for Investment, at Fair Value - Schedule of Major Classifications of Loans Held for Investment on Current and Non - Accrual Status (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans Receivable, Fair Value Disclosure $ 259,884 $ 281,671
MRP+ Loans (NYC) [Member] | Current [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans Receivable, Fair Value Disclosure 124,292 130,760
MRP+ Loans (NYC) [Member] | Non accrual [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans Receivable, Fair Value Disclosure 61,753 61,689
Non-MRP+ Loans (NYC) [Member] | Current [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans Receivable, Fair Value Disclosure 52,440 46,791
Non-MRP+ Loans (NYC) [Member] | Non accrual [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans Receivable, Fair Value Disclosure 12,305 31,788
Non-MRP+ Loans (Other) [Member] | Current [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans Receivable, Fair Value Disclosure 318 364
Non-MRP+ Loans (Other) [Member] | Non accrual [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans Receivable, Fair Value Disclosure $ 8,776 $ 10,279