CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Issuance of common stock for dividend reinvestment plan (in shares)	7,780	8,918	11,532	10,607
Common stock purchased (in shares)	90,884	427,396		869,723
Net issuance of common stock under employee stock plans (in shares)	99,217	126,260	9,342	47,428
Cash dividends paid on common stock (in dollars per share)	$ 0.33	$ 0.32	$ 0.31	$ 0.31