Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical)

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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY [Abstract]      
Purchase of treasury stock, shares (in shares) 304,859 228,789 619,981
Issuance of treasury stock, shares (in shares) 334,850 5,936,169 295,079
Cancellation of treasury stock, shares (in shares) 34,789 77,597 47,084
Dividends, per share (in dollars per share) $ 0.54 $ 0.46 $ 0.41