Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Common Stock Dividends (in shares)	0	0
Cash Dividends Paid, per Share (in dollars per share)	$ 0.26	$ 0.243
Exercised (in shares)	26,135	27,662
Shares Issued Under Directors Stock Plan (in shares)	0	0
Shares Issued Under Employee Stock Purchase Plan (in shares)	3,709	3,674
Shares Issued for Dividend Reinvestment Plans (in shares)	13,132	12,459
Purchase of Treasury Stock (in shares)	40,852	18,715