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 | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Mortgage Loan Participation Purchase And Sale Agreement [Line Items] | ||
| Weighted average interest rate | 0.00% | 5.68% |
| Average balance | $ 0 | $ 8,653 |
| Total interest expense | 31 | 152 |
| Maximum daily amount outstanding | $ 0 | $ 49,266 |