Stock-Based Compensation (Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Sep. 30, 2012
Stock-Based Compensation [Abstract]
Number of options outstanding at October 1, 2011	90
Number of options exercised	(3)
Number of options outstanding at September 30, 2012	87
Number of options exercisable	87
Weighted-average exercise price outstanding at October 1, 2011	$ 45.23
Weighted-average exercise price exercised	$ 43.35
Weighted-average exercise price outstanding at September 30, 2012	$ 45.29
Weighted-average exercise price exercisable	$ 45.29
Weighted-average remaining contractual term outstanding at September 30, 2012	2 years 2 months 12 days
Weighted-average remaining contractual term exercisable	2 years 2 months 12 days
Aggregate intrinsic value outstanding	$ 1,256
Aggregate intrinsic value exercisable	$ 1,256

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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