| CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares | 6 Months Ended | |
|---|---|---|
| Mar. 31, 2016 | Mar. 31, 2015 | |
| CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) [Abstract] | ||
| Purchase of treasury stock, shares (in shares) | 151,259 | 212,626 | 
| Issuance of treasury stock, shares (in shares) | 287,681 | 328,927 | 
| Cancellation of treasury stock, shares (in shares) | 3,957 | 32,739 | 
| Dividends, per share (in dollars per share) | $ 0.30 | $ 0.26 | 
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- References No definition available. 
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- Definition Number of treasury shares (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Number of shares of common and preferred stock retired from treasury during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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