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Investment Securities and Other Investments - Additional Information (Detail) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Schedule Of Investments [Line Items] |  |
Federal home loan bank stock | $ 14,700,000 | $ 1,700,000
Federal reserve bank stock | 6,100,000 | 6,100,000
Correspondent bank stock | 468,000 | 468,000
Other equity investments | 23,800,000 | 14,200,000
Asset Pledged as Collateral without Right [Member] | FHLB [Member] |  |
Schedule Of Investments [Line Items] |  |
Securities pledged | 241,900,000 | 23,100,000
Treasury Board Commonwealth of Virginia [Member] | Asset Pledged as Collateral without Right [Member] |  |
Schedule Of Investments [Line Items] |  |
Securities pledged | $ 0 | $ 8,700,000

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- Definition Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References No definition available. + Details
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- Definition Fair value portion of investments accounted under the equity method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 25 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126960272&loc=d3e32014-111567 + Details
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- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123599499&loc=d3e63345-112809 + Details
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- Definition Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123599499&loc=d3e63345-112809 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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