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Goodwill And Intangible Assets (Goodwill Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Mar. 31, 2018
Space And Defense Controls |  |
Goodwill [Line Items] |  |
Goodwill, accumulated impairment loss |  | $ 4,800
Industrial Systems |  |
Goodwill [Line Items] |  |
Goodwill, accumulated impairment loss |  | $ 38,200
Goodwill | Space And Defense Controls |  |
Goodwill [Line Items] |  |
Prior period reclassification adjustment | $ 86,995 |
Goodwill | Industrial Systems |  |
Goodwill [Line Items] |  |
Prior period reclassification adjustment | $ 224,194 |

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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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