ALLOWANCE FOR RISK-SHARING OBLIGATIONS - Summary of Allowance for Risk-Sharing Obligations (Detail) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
|
Sep. 30, 2026
USD ($)
loan
|
Mar. 31, 2026
USD ($)
|
Sep. 30, 2025
USD ($)
|
Mar. 31, 2025
USD ($)
|
Sep. 30, 2026
USD ($)
loan
|
Sep. 30, 2025
USD ($)
|
Dec. 31, 2025
USD ($)
loan
|
|
| Allowance for Risk-Sharing Contracts | |||||||
| Beginning balance | $ 49,081 | $ 37,546 | $ 33,191 | $ 28,159 | $ 37,546 | $ 28,159 | $ 28,159 |
| Provision (benefit) for risk-sharing obligations | 14,236 | 949 | 26,262 | 5,981 | |||
| Write-offs | (161) | (652) | |||||
| Ending balance | $ 63,156 | $ 34,140 | $ 63,156 | $ 34,140 | $ 37,546 | ||
| Look back period | 10 years | 10 years | |||||
| Number of defaulted loans | loan | 2 | ||||||
| Amount defaulted | $ 46,400 | ||||||
| Collateral based reserves | 4,800 | ||||||
| Additional collateral-based reserves | $ 1,500 | ||||||
| Number of re-negotiated default loans | loan | 4 | ||||||
| Additional reserves placed on defaulted loans due to re-negotiations | $ 7,900 | ||||||
| Number of risk sharing loans | loan | 1 | 1 | 3 | ||||
| Risk sharing obligated loans | $ 227,900 | $ 227,900 | $ 158,800 | ||||
| Aggregate collateral-based reserves on loans | $ 37,800 | $ 37,800 | $ 12,600 | ||||
| Investment, Type [Extensible Enumeration] | us-gaap:FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember | us-gaap:FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember | us-gaap:FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember | ||||
| Fannie Mae DUS program | |||||||
| Allowance for Risk-Sharing Contracts | |||||||
| Maximum quantifiable contingent liability associated with guarantees | $ 14,500,000 | $ 14,500,000 | $ 14,100,000 | ||||
| Fannie Mae DUS Program | |||||||
| Allowance for Risk-Sharing Contracts | |||||||
| Weighted average remaining life of the at risk servicing portfolio | 4 years 7 months 6 days | 5 years 1 month 6 days | |||||
| Number of risk sharing loans | loan | 16 | 16 | 11 | ||||