Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL)

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CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) - $ / shares
Jun. 30, 2018
Sep. 30, 2017
Statement of Financial Position [Abstract]    
Preferred stock, par value per share (in dollars per share) $ 0 $ 0
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Common stock, par value per share (in dollars per share) $ 1 $ 1.00
Common stock, shares authorized (in shares) 15,000,000 15,000,000
Common stock, shares issued (in shares) 8,416,145 8,416,145
Common stock, shares outstanding (in shares) 8,192,398 8,238,830
Treasury stock at cost, shares (in shares) 223,747 177,315