Goodwill And Intangible Assets (Changes In Carrying Amount Of Goodwill) (Details) $ in Thousands	9 Months Ended
Jun. 30, 2018 USD ($)
Goodwill
Beginning balance	$ 774,268
Acquisitions	21,310
Foreign currency translation	(4,752)
Ending balance	790,826
Aircraft Controls
Goodwill
Beginning balance	181,375
Acquisitions	0
Foreign currency translation	(780)
Ending balance	180,595
Space And Defense Controls
Goodwill
Beginning balance	259,951
Acquisitions	3,769
Foreign currency translation	(96)
Ending balance	263,624
Industrial Systems
Goodwill
Beginning balance	332,942
Acquisitions	17,541
Foreign currency translation	(3,876)
Ending balance	$ 346,607

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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