Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]
Cash Dividends Paid, per Share (in dollars per share)	$ 0.26	$ 0.252	$ 0.52	$ 0.505
Stock Options Exercised (in shares)	15,337	2,873	22,264	17,155
Shares Issued Under the Directors' Stock Plan (in shares)	2,672	4,245	5,844	4,245
Shares Issued Under Employee Stock Purchase Plan (in shares)	3,648	5,310	7,917	8,958
Shares Issued for Dividend Reinvestment Plans (in shares)	12,366	16,029	25,015	32,030
Purchase of Treasury Stock (in shares)	5,101		5,101	50,021