Annual report pursuant to Section 13 and 15(d)

Loans Held for Investment, Subject to Nonrecourse Debt, at Fair Value - Schedule of Mortgage Loans Held For Investment, Subject to Nonrecourse Debt that Were Greater Than 90 Days Past Due and on Non-Accrual Status (Detail)

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Loans Held for Investment, Subject to Nonrecourse Debt, at Fair Value - Schedule of Mortgage Loans Held For Investment, Subject to Nonrecourse Debt that Were Greater Than 90 Days Past Due and on Non-Accrual Status (Detail) - Loans 90 days or more past due and on non-accrual status Fair value [Member] - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Loans 90 days or more past due and on non-accrual status Fair value:    
Mortgage loans held for investment, Total Fair value $ 26,081 $ 32,377
Mortgage loans held for investment, Total Aggregate Unpaid Principal Balance 26,472 33,888
Mortgage loans held for investment, Total Difference (391) (1,511)
Commercial Mortgage Loans [Member]    
Loans 90 days or more past due and on non-accrual status Fair value:    
Mortgage loans held for investment, Total Fair value 26,081 32,377
Mortgage loans held for investment, Total Aggregate Unpaid Principal Balance $ 26,472 $ 33,888