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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) (USD $)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) [Abstract]
Purchase of treasury stock (in shares)	1,319,375	1,070,173	796,916
Issuance of treasury stock (in shares)	290,854	246,178	241,016
Dividends, per share (in dollars per share)	$ 0.33	$ 0.29	$ 0.265

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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