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Acquisitions Details (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Nov. 01, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Sep. 30, 2021
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 341,645 |  | $ 341,645 |  | $ 225,522
Operating lease right-of-use assets |  | 15,435 |  | 15,435 |  | 15,684
Operating lease liability |  | 17,625 |  | 17,625 |  | $ 18,368
Ventus |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash paid at closing | $ 350,000 |  |  |  |  |
Goodwill | $ 116,890 |  |  |  |  |
Weighted average useful life identifiable intangibles | 19 years 2 months 12 days |  |  |  |  |
Net income |  | $ 2,578 | $ 2,058 | (1,075) | $ (5,725) |
Ventus | Customer Relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted average useful life identifiable intangibles | 20 years 6 months |  |  |  |  |
Ventus | Trademarks |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted average useful life identifiable intangibles | 13 years |  |  |  |  |
Ventus | Purchased and Core Technology |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted average useful life identifiable intangibles | 11 years |  |  |  |  |
Ventus | General and Administrative |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquisition costs |  |  |  | $ 4,000 |  |
Other non-current assets | Ventus |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Operating lease right-of-use assets | $ 900 |  |  |  |  |
Other current liabilities and other noncurrent liabilities | Ventus |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Operating lease liability | $ 900 |  |  |  |  |

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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 The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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