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Retirement Benefits (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Pension and Other Postretirement Benefit Contributions [Abstract]
Value of Company Stock Contributed to Defined Contribution Benefit Plans	$ 9,335	$ 9,107
Treasury Stock Issued During Period, Shares, Employee Benefit Plans	209

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The value of company stock contributed annually to defined contribution employee benefit plans equal to 5% of employees' eligible prior year wages. The contribution may be funded by treasury stock shares or a cash contribution to the stock plan which is then used to purchase shares of the company's stock on the open market.

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- Definition

Number of treasury shares issued during the period to an employee benefit plan.

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