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Business Acquisition (Schedule of Finite-Lived and Indefinite-Lived Intangible Assets Acquired) (Details) - USD ($) $ in Thousands | 12 Months Ended |
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Sep. 30, 2020 | Jun. 30, 2019
Business Acquisition, Acquiree - L'Orange [Member] |  |
Business Acquisition [Line Items] |  |
Intangible assets | $ 573,427 | $ 573,427
Trade Name [Member] | Business Acquisition, Acquiree - L'Orange [Member] |  |
Business Acquisition [Line Items] |  |
Intangible assets | $ 67,298 |
Customer Relationships And Contracts [Member] |  |
Business Acquisition [Line Items] |  |
Weighted- Average Useful Life | 22 years |
Customer Relationships And Contracts [Member] | Business Acquisition, Acquiree - L'Orange [Member] |  |
Business Acquisition [Line Items] |  |
Intangible assets | $ 388,705 |
Process Technology [Member] |  |
Business Acquisition [Line Items] |  |
Weighted- Average Useful Life | 22 years |
Process Technology [Member] | Business Acquisition, Acquiree - L'Orange [Member] |  |
Business Acquisition [Line Items] |  |
Intangible assets | $ 74,260 |
Backlog [Member] |  |
Business Acquisition [Line Items] |  |
Weighted- Average Useful Life | 1 year |
Backlog [Member] | Business Acquisition, Acquiree - L'Orange [Member] |  |
Business Acquisition [Line Items] |  |
Intangible assets | $ 42,932 |
Other Intangible Assets [Member] |  |
Business Acquisition [Line Items] |  |
Weighted- Average Useful Life | 3 years |
Other Intangible Assets [Member] | Business Acquisition, Acquiree - L'Orange [Member] |  |
Business Acquisition [Line Items] |  |
Intangible assets | $ 232 |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=121600890&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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