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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Employee Stock Ownership Plan (ESOP) [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Shares Issued Under Employee Benefit plan | 361,500 |
Blue Ridge ESOP [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Shares Issued Under Employee Benefit plan | 192,066 | 156,087
Pension Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Benefit Plan Contributions by Employer | $ 703 |
Accumulated benefit obligation | 1,100 |
Funded Asset for the Pension Plan | 1,159 | $ 0
Funded (unfunded) status, end of year | 10 |
PRB Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Benefit Plan Contributions by Employer | 6 |
Funded Asset for the Pension Plan | 0 | 0
Funded (unfunded) status, end of year | $ (52) |
Contribution Plan, Description | the Bay Banks Merger, the Company also assumed a post-retirement benefit plan (the “PRB Plan”) covering retirees who were age 55 with 10 years of service or age 65 with five years of service prior to March 1, 2018, when the plan was curtailed. The PRB Plan provides coverage toward a retiree’s eligible medical and life insurance benefits. The PRB Plan is unfunded and benefits are expensed as incurred. |
PRB Plan [Member] | Unfunded Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Accumulated benefit obligation | $ 52 |
The 401k Profit Sharing Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan Expense | $ 2,500 | $ 1,200
Maximum [Member] | The 401k Profit Sharing Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Employer Matching Contribution | 5.00% |

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