Retirement Plans (Contributions Expected To Be Paid In The Next Fiscal Year And The Projected Benefit Payments) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net contributions during fiscal 2013	$ 18,411
2013	14,623
2014	14,859
2015	15,076
2016	15,447
2017	16,222
2018-2022	94,876
Postretirement Health Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net contributions during fiscal 2013	1,440
2013	1,440
2014	1,524
2015	1,613
2016	1,706
2017	1,840
2018-2022	$ 11,163

The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph g

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant