Mortgage Loan Participation Purchase and Sale Agreement - Summary of Mortgage Loan Participation Purchase and Sale Agreement (Detail) - Mortgage Loan Participation Purchase and Sale Agreement [Member] - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Mortgage Loan Participation Purchase And Sale Agreement [Line Items] | ||||
| Average balance | $ 0 | $ 9,666 | $ 0 | $ 9,162 |
| Weighted average interest rate | 0.00% | 5.66% | 0.00% | 5.67% |
| Total interest expense | $ 32 | $ 168 | $ 63 | $ 320 |
| Maximum daily amount outstanding | $ 0 | $ 25,809 | $ 0 | $ 49,266 |