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Pension Plans (Fair Value Of Plan Assets) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
--- | --- | --- | ---
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | $ 61,935 | $ 57,961 | $ 157,350
International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 61,935 | 57,961 |
Government [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 8,518 | 11,086 |
Europe Corporate Investment Grade [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 10,218 | 7,487 |
Europe Large Capitalization Stocks [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 30,615 | 30,887 |
Commodity Option [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 2,709 |  |
Insurance Company Funds [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | [1] | 9,578 | 7,668 |
Cash [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 297 | 833 |
Level 1 [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 52,357 | 50,293 |
Level 1 [Member] | Government [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 8,518 | 11,086 |
Level 1 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 10,218 | 7,487 |
Level 1 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 30,615 | 30,887 |
Level 1 [Member] | Commodity Option [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 2,709 |  |
Level 1 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | [1] | 0 | 0 |
Level 1 [Member] | Cash [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 297 | 833 |
Level 2 [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 9,578 | 7,668 |
Level 2 [Member] | Government [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 | 0 |
Level 2 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 | 0 |
Level 2 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 | 0 |
Level 2 [Member] | Commodity Option [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 |  |
Level 2 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | [1] | 9,578 | 7,668 |
Level 2 [Member] | Cash [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 | 0 |
Level 3 [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 | 0 |
Level 3 [Member] | Government [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 | 0 |
Level 3 [Member] | Europe Corporate Investment Grade [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 | 0 |
Level 3 [Member] | Europe Large Capitalization Stocks [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 | 0 |
Level 3 [Member] | Commodity Option [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | 0 |  |
Level 3 [Member] | Insurance Company Funds [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets | [1] | 0 | 0 |
Level 3 [Member] | Cash [Member] | International Plan Assets [Member] |  |  |  |
Fair Value of Plan Assets [Line Items] |  |  |  |
Fair value of plan assets |  | $ 0 | $ 0 |
[1] | These investments are comprised primarily of funds invested with an insurance company in Japan with a guaranteed rate of return. The insurance company invests these assets primarily in government and corporate bonds.

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: 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=58740216&loc=d3e1928-114920 + Details
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