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Share-Based Compensation (Schedule Of Stock Options Awarded Under The Option Plans) (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Share-Based Compensation [Abstract]
Stock options, Shares, October 1	435,054	761,931	891,826
Stock options Granted, Shares			2,000
Stock options Exercised, Shares	(100,872)	(104,912)	(73,765)
Stock options Cancelled, Shares	(208,366)	(221,965)	(58,130)
Stock options, Shares, September 30	125,816	435,054	761,931
Stock options, Shares, Reserved for future grant	1,301,090	1,115,776	949,062
Stock options Exercisable, Shares	125,149	397,073	677,538
Stock options Estimated Weighted Avg. Price, October 1	$ 35.58	$ 35.15	$ 33.63
Stock options Granted, Estimated Weighted Avg. Price			$ 32.55
Stock options Exercised, Estimated Weighted Avg. Price	$ 14.98	$ 13.18	$ 12.03
Stock options Cancelled, Estimated Weighted Avg. Price	$ 45.18	$ 44.67	$ 41.17
Stock options Estimated Weighted Avg. Price, September 30	$ 36.29	$ 35.58	$ 35.15
Stock options Exercisable, Estimated Weighted Avg. Price	$ 36.31	$ 35.42	$ 34.88

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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