Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
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)	2,873	36,577	17,155	62,712
Shares Issued Under the Directors' Stock Plan (in shares)	4,245	3,997	4,245	3,997
Shares Issued Under Employee Stock Purchase Plan (in shares)	5,310	4,239	8,958	7,948
Shares Issued for Dividend Reinvestment Plans (in shares)	16,029	13,566	32,030	26,698
Purchase of Treasury Stock (in shares)		19,708	50,021	60,560