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Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 USD ($) Segment | Dec. 31, 2021 USD ($) | Jan. 01, 2022 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Fair value adjustments on other investments | $ 9,300,000 | $ 7,300,000 |  |  |
Other equity investments | 21,600,000 | 12,300,000 |  |  |
Other investments | 24,672,000 | 12,681,000 |  |  |
Loans held for sale | 69,534,000 | 121,943,000 |  |  |
Allowance for loan losses | $ 30,740,000 | 12,121,000 |  | $ 13,827,000 | $ 4,572,000
Estimated useful lives | us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember |  |  |  |
Lease Income | $ 0 | 0 |  |  |
Impairment of goodwill | 0 | 0 |  |  |
Equity, Including Portion Attributable to Noncontrolling Interest | $ 248,793,000 | 277,139,000 |  | $ 108,200,000 | $ 92,337,000
Number of reportable business segments | Segment | 3 |  |  |  |
Retained earnings | $ 97,682,000 | 85,982,000 |  |  |
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Equity, Including Portion Attributable to Noncontrolling Interest | 3,542,000 |  | $ 3,500,000 |  |
Minimum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Retained earnings | 5,200,000 |  |  |  |
Minimum [Member] | Unfunded Commitments [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Retained earnings | 2,900,000 |  |  |  |
Maximum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Allowance for loan losses | 7,400,000 |  |  |  |
Maximum [Member] | Unfunded Commitments [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Financial Instruments and Commitments | $ 3,700,000 |  |  |  |
Purchased Computer Software [Member] | Minimum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 1 year |  |  |  |
Purchased Computer Software [Member] | Maximum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 3 years |  |  |  |
Building [Member] | Minimum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 39 years |  |  |  |
Building [Member] | Maximum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 40 years |  |  |  |
Furniture, Fixtures and Equipment [Member] | Minimum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 3 years |  |  |  |
Furniture, Fixtures and Equipment [Member] | Maximum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 15 years |  |  |  |
Substandard [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Troubled debt restructuring | $ 500,000,000 |  |  |  |
Virginia Community Bankshares, Inc [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Allowance for loan losses | 0 |  |  |  |
Fintech [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Loans held for sale | 9,800,000 | 5,800,000 |  |  |
Government Guaranteed Loans [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Loans held for sale | $ 44,700,000 | $ 0 |  |  |

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