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v3.22.1

Goodwill and Other Identifiable Intangible Assets, Net (Additional Information) (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) segment | Sep. 30, 2021 USD ($)
Goodwill [Line Items] |  |
Number of Reportable Segments | segment | 2 |
Goodwill | $ 341,645 | $ 225,522
Market Capitalization | 686,300 |
Enterprise Routers |  |
Goodwill [Line Items] |  |
Goodwill | 32,700 |
Console Servers |  |
Goodwill [Line Items] |  |
Goodwill | 60,200 |
OEM Solutions |  |
Goodwill [Line Items] |  |
Goodwill | 63,400 |
Infrastructure Mgmt. |  |
Goodwill [Line Items] |  |
Goodwill | 15,400 |
IoT Solutions Segment |  |
Goodwill [Line Items] |  |
Goodwill | 49,500 |
IoT Products & Services Segment |  |
Goodwill [Line Items] |  |
Goodwill | 174,252 | 175,180
IoT Solutions Segment |  |
Goodwill [Line Items] |  |
Goodwill | $ 167,393 | $ 50,342
Control Premium | Minimum |  |
Goodwill [Line Items] |  |
Goodwill Valuation Implied Control Premium | (4.50%) |
Control Premium | Maximum |  |
Goodwill [Line Items] |  |
Goodwill Valuation Implied Control Premium | 5.40% |

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