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Pension Plans (Fair Value Of Plan Assets) (Details) - International Plan Assets [Member] - USD ($) $ in Thousands | Sep. 30, 2018 | Sep. 30, 2017
--- | --- | ---
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | $ 70,141 | $ 70,494
Government [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 29,754 | 29,445
Europe Corporate Investment Grade [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 2,499 | 10,675
Europe Large Capitalization Stocks [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 24,502 | 16,164
Commodity Option [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 724 | 3,966
Insurance Company Funds [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 8,413 | 8,714
Cash [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 4,249 | 1,530
Level 1 [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 61,728 | 61,780
Level 1 [Member] | Government [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 29,754 | 29,445
Level 1 [Member] | Europe Corporate Investment Grade [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 2,499 | 10,675
Level 1 [Member] | Europe Large Capitalization Stocks [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 24,502 | 16,164
Level 1 [Member] | Commodity Option [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 724 | 3,966
Level 1 [Member] | Insurance Company Funds [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 1 [Member] | Cash [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 4,249 | 1,530
Level 2 [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 8,413 | 8,714
Level 2 [Member] | Government [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 2 [Member] | Europe Corporate Investment Grade [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 2 [Member] | Europe Large Capitalization Stocks [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 2 [Member] | Commodity Option [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 2 [Member] | Insurance Company Funds [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 8,413 | 8,714
Level 2 [Member] | Cash [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 3 [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 3 [Member] | Government [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 3 [Member] | Europe Corporate Investment Grade [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 3 [Member] | Europe Large Capitalization Stocks [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 3 [Member] | Commodity Option [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 3 [Member] | Insurance Company Funds [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | 0 | 0
Level 3 [Member] | Cash [Member] |  |
Fair Value of Plan Assets [Line Items] |  |
Fair value of plan assets | $ 0 | $ 0

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- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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