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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Issuance of restricted stock, stock incentive plan, shares	18,150	14,609	14,493
Issuance of common stock, dividend investment plan, shares	14,176	14,731	13,769
Issuance of common stock, employee benefit plan, shares	4,064	4,580	5,958
Stock Repurchased During Period, Shares	53,988	39,333	52,936
Dividends declared, per share (in USD per share)	$ 1.0	$ 0.94	$ 0.88

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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- Definition

Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.

+ References

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Number of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.

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- Definition

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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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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