Quarterly report pursuant to Section 13 or 15(d)

Other Financing Lines of Credit - Summary Of Components of Other Financing Lines of Credit (Detail)

v3.23.3
Other Financing Lines of Credit - Summary Of Components of Other Financing Lines of Credit (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Line of Credit Facility [Line Items]    
Total Capacity $ 1,507,342  
Outstanding borrowings 852,813 $ 1,327,634
Mortgage Lines    
Line of Credit Facility [Line Items]    
Total Capacity 101,828  
Outstanding borrowings 49,544 139,225
Mortgage Lines | October 2023, First Lien Mortgages    
Line of Credit Facility [Line Items]    
Total Capacity 15,000  
Outstanding borrowings 9,332 83,814
Mortgage Lines | November 2023, Home Improvement Consumer Loans    
Line of Credit Facility [Line Items]    
Total Capacity 50,000  
Outstanding borrowings 3,384 7,495
Mortgage Lines | Various Maturities, Mortgage Related Assets    
Line of Credit Facility [Line Items]    
Total Capacity 36,828  
Outstanding borrowings 36,828 37,604
Mortgage Lines | No Maturity, MSR    
Line of Credit Facility [Line Items]    
Total Capacity 0  
Outstanding borrowings 0 10,312
Reverse Lines    
Line of Credit Facility [Line Items]    
Total Capacity 1,385,514  
Outstanding borrowings 783,269 983,410
Reverse Lines | Various Maturities, Mortgage Related Assets    
Line of Credit Facility [Line Items]    
Total Capacity 360,514  
Outstanding borrowings 340,514 320,715
Reverse Lines | April 2023 - November 2023, First Lien Mortgages    
Line of Credit Facility [Line Items]    
Total Capacity 935,000  
Outstanding borrowings 353,524 584,658
Reverse Lines | October 2027, MSR    
Line of Credit Facility [Line Items]    
Total Capacity 70,000  
Outstanding borrowings 69,231 33,036
Reverse Lines | September 2023, Unsecuritized Tails    
Line of Credit Facility [Line Items]    
Total Capacity 20,000  
Outstanding borrowings $ 20,000 $ 45,001
Reverse Lines | September 2023, Unsecuritized Tails | Prime Rate    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.50% 0.50%
Reverse Lines | September 2023, Unsecuritized Tails | Prime Rate, Floor    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 6.00% 6.00%
Commercial Lines    
Line of Credit Facility [Line Items]    
Total Capacity $ 20,000  
Outstanding borrowings 20,000 $ 204,999
Commercial Lines | July 2023 - October 2023, First Lien Mortgages    
Line of Credit Facility [Line Items]    
Total Capacity 0  
Outstanding borrowings 0 159,938
Commercial Lines | January 2024, Mortgage Related Assets    
Line of Credit Facility [Line Items]    
Total Capacity 20,000  
Outstanding borrowings 20,000 12,500
Commercial Lines | No Maturity, Encumbered Agricultural Loans    
Line of Credit Facility [Line Items]    
Total Capacity 0  
Outstanding borrowings 0 7,561
Commercial Lines | No Maturity, Second Lien Mortgages    
Line of Credit Facility [Line Items]    
Total Capacity 0  
Outstanding borrowings $ 0 $ 25,000