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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Allowance for loan losses	$ 26,133	$ 25,028
Common stock, no par value
Common shares, shares authorized	20,000,000	20,000,000
Common stock, shares issued	17,704,090	17,664,951
Treasury shares, common shares	1,953,611	1,766,919

X

- Definition

Face amount per share of no-par value common stock.

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-SubTopic 10
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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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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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