Retirement Benefits (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Value of Company Stock Contributed to Defined Contribution Benefit Plans	$ 12,574	$ 11,193	$ 12,574	$ 11,193
Treasury Stock Issued During Period, Shares, Employee Benefit Plans	259	260
Treasury Stock at Cost [Member]
Value of Company Stock Contributed to Defined Contribution Benefit Plans			$ 8,084	$ 8,356
Treasury Stock Issued During Period, Shares, Employee Benefit Plans			259	260

Value of shares issued during the period to an employee benefit plan, such as a defined contribution or defined benefit plan.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration