Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Summary of Commercial Mortgage Fix and Flip Loans (Detail)

v3.21.2
Fair Value - Summary of Commercial Mortgage Fix and Flip Loans (Detail) - Commercial Mortgage Fix and Flip Loans [Member] - Weighted Average [Member]
9 Months Ended
Sep. 30, 2021
Prepayment Rate [Member]  
Fair Value Fix And Flip Loans Classified Under Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]  
Prepayment rate (SMM) 12.20%
Discount rate [Member]  
Fair Value Fix And Flip Loans Classified Under Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]  
Discount rate 5.40%
Loss frequency [Member]  
Fair Value Fix And Flip Loans Classified Under Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]  
Loss frequency 0.40%