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) (USD $)
6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) [Abstract]    
Purchase of treasury stock, shares (in shares) 212,626us-gaap_TreasuryStockSharesAcquired 108,605us-gaap_TreasuryStockSharesAcquired
Issuance of treasury stock, shares (in shares) 328,927us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued 281,231us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued
Cancellation of treasury stock, shares (in shares) 32,739us-gaap_TreasuryStockSharesRetired 77,417us-gaap_TreasuryStockSharesRetired
Dividends, per share (in dollars per share) $ 0.26us-gaap_CommonStockDividendsPerShareCashPaid $ 0.22us-gaap_CommonStockDividendsPerShareCashPaid