Loans - Additional Information (Detail) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Residential mortgage loan | $ 2,599,917 | $ 2,536,043 |
| Asset Pledged as Collateral without Right [Member] | HELOC [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Residential mortgage loan | 13,100 | 11,900 |
| Asset Pledged as Collateral without Right [Member] | Commercial Real Estate [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Residential mortgage loan | 236,500 | 369,500 |
| Asset Pledged as Collateral without Right [Member] | Multi-family Real Estate Loans [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Residential mortgage loan | 38,100 | 47,700 |
| Asset Pledged as Collateral without Right [Member] | Residential Mortgage [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Residential mortgage loan | $ 183,500 | $ 190,100 |