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Goodwill (Schedule of Goodwill) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | $ 813,250 | $ 556,545
Additions |  | 257,447
Effects of Foreign Currency Translation | (15,397) | (742)
Goodwill, Ending Balance | 797,853 | 813,250
Aerospace [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 455,423 | 455,423
Additions |  |
Effects of Foreign Currency Translation |  |
Goodwill, Ending Balance | 455,423 | 455,423
Industrial [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 357,827 | 101,122
Additions |  | 257,447
Effects of Foreign Currency Translation | (15,397) | (742)
Goodwill, Ending Balance | $ 342,430 | $ 357,827

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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