Consolidated Statements of Shareholders' Equity (Parentheticals) - $ / shares	3 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Tax withholdings for Directors, Employee Benefit and Stock Plans (in shares)	1,321	15,756	1,560	6,952
Dividends paid per Common Share (in dollars per share)	$ 0.22	$ 0.22	$ 0.22	$ 0.22