Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities and Securitizations - Additional Information (Detail)

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Variable Interest Entities and Securitizations - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Apr. 30, 2021
Feb. 28, 2021
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2020
Variable Interest Entities and Securitizations [Line Items]                
Gain (loss) on sale of mortgage loans         $ 197,129 $ 284,948 $ 282,424 $ 291,671
FAM [Member] | HAWT 2021-INV1 securitization [Member]                
Variable Interest Entities and Securitizations [Line Items]                
Percentage of beneficial interest in securitized trust   5.00%            
FAM Mortgage Loan [Member]                
Variable Interest Entities and Securitizations [Line Items]                
Transfer of mortgage loans held-for-sale at initial fair value $ 15,700 $ 15,700     15,700      
Servicing asset recognized on sale of mortgage loan 1,100 1,100     1,100      
Proceeds from securitizations of loans held-for-investment 299,000              
Gain (loss) on sale of mortgage loans 12,500              
Charge off expenses on transferred mortgage loan         0 $ 0 $ 0 $ 0
Repayments of debt       $ 294,200        
FAM Mortgage Loan [Member] | Principal [Member]                
Variable Interest Entities and Securitizations [Line Items]                
Repayments of debt     $ 239,800          
FAM Mortgage Loan [Member] | Interest [Member]                
Variable Interest Entities and Securitizations [Line Items]                
Repayments of debt     6,300          
FAM Mortgage Loan [Member] | Discount [Member]                
Variable Interest Entities and Securitizations [Line Items]                
Repayments of debt     3,700          
FAM Mortgage Loan [Member] | FAM [Member] | Financial Asset 60 Days Or Less Past Due [Member]                
Variable Interest Entities and Securitizations [Line Items]                
Mortgage loans transferred to unconsolidated securitization trusts amount $ 100 $ 100     $ 100      
2018 & 2019, and 2020 ANTLR securitizations [Member] | Finance of america commercial LLC [Member]                
Variable Interest Entities and Securitizations [Line Items]                
Repayments of debt     $ 175,300