Common Stock and Earnings per Share (Schedule of Common Stock Outstanding) (Details)	12 Months Ended
Dec. 31, 2018 shares
Earnings Per Share [Abstract]
Shares outstanding at January 1	12,286,896
20% stock dividend paid on December 14, 2018	2,457,484
Issuance of common stock:
Employee restricted stock grants	9,530
Employee SARs exercised	12,048
Directors' compensation	9,526
Shares repurchased	(163,634)
Shares forfeited	(564)
Shares outstanding at December 31	14,611,286

Number of share options and stock appreciation rights exercised during the current period.

No definition available.

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Number of shares of common stock issued as dividends during the period. Excludes stock splits.

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Number of shares issued which are neither cancelled nor held in the treasury.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Number of shares (or other type of equity) forfeited during the period.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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