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Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Dividends on common stock (in dollars per share)	$ 0.21	$ 0.21
Common Stock [Member]
Common shares released from Employee Benefit Trust, shares (in shares)	(116,414)	138,775
Restricted stock unit awards vested, shares (in shares)	(272,946)	287,155
Exercise of stock options, shares (in shares)		300
Treasury Stock [Member]
Purchase of treasury shares (in shares)	(142,405)
Repurchase of shares to satisfy tax obligation, shares (in shares)	(74,145)	83,908

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

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