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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 0.54	$ 0.52	$ 1.62	$ 1.56
Net exercise of stock options (in shares)	3,276	417	11,386	3,605
Common stock repurchased and returned to unissued status (in shares)	170,775		272,310	71,288
Shares issued for dividend reinvestment plan (in shares)		12,723	32	24,752
Directors deferred compensation plan (in shares)	1,977	2,776	2,025	2,088
Restricted stock activity (in shares)	3,179	1,346	8,392	9,406

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

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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.

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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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