Consolidated Statements of Stockholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Consolidated Statements of Stockholders' Equity (unaudited) [Abstract]
Cash dividends - per share (in dollars per share)	$ 0.28	$ 0.27	$ 0.56	$ 0.54
Purchase of treasury shares (in shares)	182,900	23,627	400,000	280,658
Net issuance of shares to employee benefit plans and other stock plans (in shares)	26,983	53,788	68,394	106,927