Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Cash Dividends Paid, per Share (in dollars per share)	$ 0.26	$ 0.242	$ 0.52	$ 0.485
Exercised (in shares)	36,577	51,339	62,712	79,001
Shares Issued Under Directors Stock Plan (in shares)	3,997	2,705	3,997	2,705
Shares Issued Under Employee Stock Purchase Plan (in shares)	4,239	3,939	7,948	7,613
Shares Issued for Dividend Reinvestment Plans (in shares)	13,566	11,846	26,698	24,305
Purchase of Treasury Stock (in shares)	19,708	21,294	60,560	40,009