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Consolidated Balance Sheets (Parentheticals) - $ / shares
Jun. 30, 2020
Jun. 30, 2019
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) 12,235,786 12,334,607
Treasury stock, shares (in shares) 15,748,492 15,649,671