Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 30, 2018	Jun. 30, 2017
Common stock, par value (in dollars per share)	$ 1.50	$ 1.50
Common stock, shares authorized (in shares)	60,000,000	60,000,000
Common stock, shares issued (in shares)	27,984,278	27,984,278
Common stock, shares outstanding (in shares)	12,705,562	12,662,661
Treasury stock, shares (in shares)	15,278,716	15,321,617