Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical)

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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares
3 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]    
Purchase of treasury stock (in shares) 75,765 95,229
Issuance of treasury stock (in shares) 223,971 205,623
Cancellations of treasury stock (in shares) 5,214 0
Dividends, per share (in dollars per share) $ 0.19 $ 0.17