Investment Securities and Other Investments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Schedule Of Investments [Line Items]
Proceeds from sales, calls and maturities of available-for-sale	$ 71,804	$ 53,595
Proceeds from calls, maturities, sales, paydowns and maturities of securities held to maturity		1,212
Federal home loan bank stock	1,700	5,800
Federal reserve bank stock	6,100	2,200
Correspondent bank stock	468	248
Other equity investments	14,200	3,000
Other investments	13,643	6,565
FHLB [Member]
Schedule Of Investments [Line Items]
Securities pledged	23,100	29,400
Treasury Board Commonwealth of Virginia [Member]
Schedule Of Investments [Line Items]
Securities pledged	$ 8,700	$ 12,500

Correspondent bank stock.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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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).

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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).

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Amount of investments classified as other.

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Sum of the carrying amounts as of the date of the latest financial statement presented of securities which are owned but transferred to another party to serve as collateral to partially or fully secure a debt obligation, repurchase agreement or other current or potential obligation, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

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Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of cash inflow from the sale or maturity of long-term held-to-maturity securities.

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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.

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