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Share-Based Employee Compensation (Summary Of Stock Option Activity) (Details) - Nonvested stock awards and units $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	P7Y
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, shares, beginning balance | shares	312,359
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares	113,447
Shares, Exercised | shares	(116,388)
Shares, Forfeited | shares	(18,894)
Shares, Expired | shares	(2,906)
Options outstanding, shares, ending balance | shares	287,618
Options exercisable, Shares | shares	111,178
Options exercisable and expected to vest, Shares | shares	287,618
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options outstanding, Weighted Average Exercise Price, Beginning balance (usd per share) | $ / shares	$ 80.15
Options outstanding, Weighted Average Exercise Price, Granted (usd per share) | $ / shares	90.06
Options outstanding, Weighted Average Exercise Price, Exercised (usd per share) | $ / shares	68.37
Options outstanding, Weighted Average Exercise Price, Forfeited (usd per share) | $ / shares	94.93
Options outstanding, Weighted Average Exercise Price, Expired (usd per share) | $ / shares	104.95
Options outstanding, Weighted Average Exercise Price, Ending balance (usd per share) | $ / shares	87.61
Options exercisable, Weighted Average Exercise Price (usd per share) | $ / shares	81.01
Options exercisable and expected to vest, Weighted Average Exercise Price (usd per share) | $ / shares	$ 87.61
Options outstanding, Weighted Average Remaining Contractual Term, years	4 years 11 months 23 days
Options exercisable, Weighted Average Remaining Contractual Term, years	3 years 10 months 6 days
Options exercisable and expected to vest, Weighted Average Remaining Contractual Term, years	4 years 11 months 23 days
Options outstanding, Aggregate Intrinsic Value | $	$ 1,205
Options exercisable, Aggregate Intrinsic Value | $	1,007
Options exercisable and expected to vest, Aggregate Intrinsic Value | $	$ 1,205

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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