Quarterly report pursuant to Section 13 or 15(d)

Revolving Credit Facilities - Narrative (Details)

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Revolving Credit Facilities - Narrative (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Jun. 30, 2024
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Line of Credit Facility [Line Items]            
Revolving credit facilities $ 999,171 $ 1,329,171        
Weighted average borrowing rate 8.11% 8.66%        
Weighted average remaining maturity 1 year 9 months 18 days 1 year 1 month 6 days        
Mortgage servicing rights, at fair value $ 2,884,304 $ 3,052,016 $ 3,065,415 $ 3,213,113 $ 3,273,956 $ 2,984,937
Servicing advances 92,000 143,200        
Restricted cash 89,125 65,101        
As restricted collateral for borrowings            
Line of Credit Facility [Line Items]            
Restricted cash 13,998 12,575        
Asset Pledged as Collateral            
Line of Credit Facility [Line Items]            
Mortgage servicing rights, at fair value 2,900,000 3,000,000        
Line of Credit | As restricted collateral for borrowings            
Line of Credit Facility [Line Items]            
Restricted cash 1,500          
Line of Credit | Asset Pledged as Collateral            
Line of Credit Facility [Line Items]            
Mortgage servicing rights, at fair value 1,800,000 2,200,000        
Servicing advances $ 86,600 $ 79,700