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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 0.50	$ 0.48
Net exercise of stock options and related tax benefit (in shares)	4,996	1,670
Common stock repurchased and returned to unissued status (in shares)		15,500
Shares issued for employee stock ownership plan (in shares)		38,883
Directors deferred compensation plan (in shares)	4,770	4,218
Restricted stock activity (in shares)		5,332

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The number of shares issued upon the exercise of stock options during the period, net of tax benefit.

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

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Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.

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

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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 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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