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Intangible Assets, Net (Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class) (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Oct. 01, 2018 | [1] | Sep. 30, 2018
--- | --- | --- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible Assets, Gross, Total | $ 983,266 |  | $ 1,016,456 |
Accumulated Amortization of Finite-Lived Intangible | (371,274) |  | (315,573) |
Net Carrying Amount - Finite-Lived Intangible | 548,525 |  |  |
Intangible Assets, Net, Total | 611,992 | $ 698,364 | 700,883 | [1]
Trade Name [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-Lived Intangible Assets | 63,467 |  | 67,335 |
Accumulated Amortization of Finite-Lived Intangible |  |  |  |
Customer Relationships And Contracts [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 689,366 |  | 711,563 |
Accumulated Amortization of Finite-Lived Intangible | (225,981) |  | (202,575) |
Net Carrying Amount - Finite-Lived Intangible | 463,385 |  | 508,988 |
Intellectual Property [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 19,201 |  | 19,448 |
Accumulated Amortization of Finite-Lived Intangible | (18,705) |  | (18,587) |
Net Carrying Amount - Finite-Lived Intangible | 496 |  | 861 |
Process Technology [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 169,191 |  | 173,526 |
Accumulated Amortization of Finite-Lived Intangible | (84,839) |  | (75,247) |
Net Carrying Amount - Finite-Lived Intangible | 84,352 |  | 98,279 |
Backlog [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 40,500 |  | 42,955 |
Accumulated Amortization of Finite-Lived Intangible | (40,500) |  | (18,006) |
Net Carrying Amount - Finite-Lived Intangible |  |  | 24,949 |
Other Intangible Assets [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 1,541 |  | 1,629 |
Accumulated Amortization of Finite-Lived Intangible | (1,249) |  | (1,158) |
Net Carrying Amount - Finite-Lived Intangible | 292 |  | 471 |
Aerospace [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible Assets, Gross, Total | 358,054 |  | 358,055 |
Accumulated Amortization of Finite-Lived Intangible | (241,908) |  | (221,593) |
Intangible Assets, Net, Total | 116,146 |  | 136,462 |
Aerospace [Member] | Trade Name [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |
Accumulated Amortization of Finite-Lived Intangible |  |  |  |
Aerospace [Member] | Customer Relationships And Contracts [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 281,683 |  | 281,683 |
Accumulated Amortization of Finite-Lived Intangible | (181,995) |  | (166,719) |
Net Carrying Amount - Finite-Lived Intangible | 99,688 |  | 114,964 |
Aerospace [Member] | Intellectual Property [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible |  |  |  |
Accumulated Amortization of Finite-Lived Intangible |  |  |  |
Net Carrying Amount - Finite-Lived Intangible |  |  |  |
Aerospace [Member] | Process Technology [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 76,371 |  | 76,372 |
Accumulated Amortization of Finite-Lived Intangible | (59,913) |  | (54,874) |
Net Carrying Amount - Finite-Lived Intangible | 16,458 |  | 21,498 |
Aerospace [Member] | Backlog [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible |  |  |  |
Accumulated Amortization of Finite-Lived Intangible |  |  |  |
Net Carrying Amount - Finite-Lived Intangible |  |  |  |
Aerospace [Member] | Other Intangible Assets [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible |  |  |  |
Accumulated Amortization of Finite-Lived Intangible |  |  |  |
Net Carrying Amount - Finite-Lived Intangible |  |  |  |
Industrial [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible Assets, Gross, Total | 625,212 |  | 658,401 |
Accumulated Amortization of Finite-Lived Intangible | (129,366) |  | (93,980) |
Intangible Assets, Net, Total | 495,846 |  | 564,421 |
Industrial [Member] | Trade Name [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Indefinite-Lived Intangible Assets | 63,467 |  | 67,335 |
Accumulated Amortization of Finite-Lived Intangible |  |  |  |
Industrial [Member] | Customer Relationships And Contracts [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 407,683 |  | 429,880 |
Accumulated Amortization of Finite-Lived Intangible | (43,986) |  | (35,856) |
Net Carrying Amount - Finite-Lived Intangible | 363,697 |  | 394,024 |
Industrial [Member] | Intellectual Property [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 19,201 |  | 19,448 |
Accumulated Amortization of Finite-Lived Intangible | (18,705) |  | (18,587) |
Net Carrying Amount - Finite-Lived Intangible | 496 |  | 861 |
Industrial [Member] | Process Technology [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 92,820 |  | 97,154 |
Accumulated Amortization of Finite-Lived Intangible | (24,926) |  | (20,373) |
Net Carrying Amount - Finite-Lived Intangible | 67,894 |  | 76,781 |
Industrial [Member] | Backlog [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 40,500 |  | 42,955 |
Accumulated Amortization of Finite-Lived Intangible | (40,500) |  | (18,006) |
Net Carrying Amount - Finite-Lived Intangible |  |  | 24,949 |
Industrial [Member] | Other Intangible Assets [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Value - Finite-Lived Intangible | 1,541 |  | 1,629 |
Accumulated Amortization of Finite-Lived Intangible | (1,249) |  | (1,158) |
Net Carrying Amount - Finite-Lived Intangible | $ 292 |  | $ 471 |
[1] | The net book value of the backlog and customer relationships and contracts intangible assets was adjusted concurrent with the change in the timing of the associated revenue, resulting in a reduction in the net book value of these assets as of the date of adoption.

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