Goodwill and Other Intangible Assets (Schedule of Other Intangible Assets) (Detail) - USD ($) $ in Thousands |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Intangible Assets | $ 10,821 | $ 11,685 |
| Accumulated Amortization | (10,435) | (10,819) |
| Net Intangible Assets | 386 | 866 |
| Core Deposits [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Intangible Assets | 9,300 | 9,300 |
| Accumulated Amortization | (8,990) | (8,582) |
| Net Intangible Assets | 310 | 718 |
| Customer Relationships [Member] | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Intangible Assets | 1,521 | 2,385 |
| Accumulated Amortization | (1,445) | (2,237) |
| Net Intangible Assets | $ 76 | $ 148 |