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Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Option [Member]
Shares transferred from treasury stock (in shares)	1,623,740	1,131,970	2,752,735
Restricted Stock [Member]
Shares transferred from treasury stock (in shares)	142,362	192,109	176,610
Net share settlement (in shares)	27,890	40,578
Treasury stock acquired (in shares)	2,155,084	2,178,151	3,882,467
Net share settlement (in shares)	27,890	40,578	35,637
Other stock issuances (in shares)	44,944	45,226	44,602

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- Definition

Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

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Number of shares of stock issued attributable to transactions classified as other.

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Number of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement.

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Number of shares that have been repurchased during the period and are being held in treasury.

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