CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 2.19	$ 2.10	$ 2.02
Net exercise of stock options (in shares)	13,498	3,775	18,053
Common stock repurchased and returned to unissued status (in shares)	304,513	127,690	376,021
Directors deferred compensation plan (in shares)	140	893	1,729
Restricted stock activity (in shares)	23,505	43,963	24,180
Shares issued for dividend reinvestment plan (in shares)	32	29,842