Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020
Purchase of shares of treasury stock (in shares)	38,369	75,980
Shares of common stock for the exercise of stock options (in shares)	148,284	260,481
Dividends declared per common share (in dollars per share)		$ 0.21
Forfeitures of restricted common shares (in shares)	6,793