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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement Of Financial Position [Abstract]
Investment securities held-to-maturity, fair value	$ 365,288	$ 330,626
Common Stock, Par Value	$ 1.00	$ 1.00
Common Stock, Shares Authorized	20,000,000.0	20,000,000.0
Common Stock, Shares, Issued	16,100,000	16,100,000
Common Stock, Shares, Outstanding	15,900,000	16,000,000.0
Treasury Stock, Shares	202,364	98,452

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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