Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Shares of stock (in shares)	75,980	28,657
Shares of common stock for the exercise of stock options (in shares)	260,481	86,247
Dividends declared per common share (in dollars per share)	$ 0.21	$ 0.19
Shares of restricted common shares, net of (forfeitures) (in shares)		6,005