v3.26.1
Long-Term Debt - Summary of Financial Information Relating to Note Payable Secured by Credit Risk Transfer and Mortgage Servicing Assets (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Carrying value:          
Balance $ 2,481,131   $ 2,481,131   $ 2,258,128
Freddie Mac Mortgage Servicing Rights Financing [Member]          
Carrying value:          
Carrying value of notes 2,485,207   2,485,207   2,261,846
Assets securing notes payable:          
Mortgage servicing rights at fair value 3,503,566   3,503,566   3,582,211
Servicing advances 20,800   20,800   33,777
Deposits securing CRT arrangements     797,562   832,640
Notes Payable [Member] | Freddie Mac Mortgage Servicing Rights Financing [Member]          
Carrying value:          
Unamortized debt issuance costs $ (4,076)   $ (4,076)   $ (3,718)
Weighted average interest rate 6.84%   6.84%   6.91%
Assets securing notes payable:          
Derivative assets $ 21,088   $ 21,088   $ 20,037
Notes Payable [Member] | Freddie Mac MSR Financing          
Short Term Debt [Line Items]          
Average balance $ 2,501,636 $ 2,714,608 $ 2,409,401 $ 2,772,009  
Weighted-average interest rate 6.97% 7.63% 6.94% 7.61%  
Total interest expense $ 45,411 $ 53,804 $ 86,671 $ 109,059  
Credit Risk Transfer Arrangement Financing [Member] | Freddie Mac Mortgage Servicing Rights Financing [Member]          
Carrying value:          
Carrying value of notes 583,531   583,531   608,903
Freddie Mac Credit Agreements [Member] | Fannie Mae Mortgage Servicing Rights Financing [Member]          
Carrying value:          
Carrying value of notes 725,000   725,000   725,000
Freddie Mac Credit Agreements [Member] | Freddie Mac Mortgage Servicing Rights And Servicing Advance Receivables Financing [Member]          
Carrying value:          
Carrying value of notes $ 1,176,676   $ 1,176,676   $ 927,943