Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Common Stock Including Additional Paid in Capital [Member]
Employee stock purchase plan (in shares)	383	329	799	755
Dividend reinvestment plan (in shares)	5,522	4,439	10,947	9,063
Stock option exercises (in shares)	2,000		2,500	7,000
Stock grants to directors (in shares)	11,905	11,171	11,905	11,171
Share repurchase program (in shares)			119,120
Retained Earnings [Member]
Cash dividends per common share (in dollars per share)	$ 0.26	$ 0.22	$ 0.52	$ 0.44
Cash dividends per common share (in dollars per share)	$ 0.26	$ 0.22	$ 0.52	$ 0.44