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Balance Sheet Details - Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 416,315 | $ 394,908 |
Accumulated Amortization | (216,027) | (157,730) |
Net Carrying Amount | 200,288 | 237,178 |
Amortization of Intangible Assets | 36,400 | 48,700 | $ 34,600
Developed Technology Rights |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 319,436 | 305,673 |
Accumulated Amortization | (151,332) | (111,279) |
Net Carrying Amount | 168,104 | 194,394 |
Customer Relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 46,142 | 41,742 |
Accumulated Amortization | (25,630) | (17,865) |
Net Carrying Amount | 20,512 | 23,877 |
Patents And Trademarks [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 23,504 | 20,260 |
Accumulated Amortization | (19,255) | (17,180) |
Net Carrying Amount | 4,249 | 3,080 |
Trade Names |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 24,973 | 24,973 |
Accumulated Amortization | (17,550) | (9,146) |
Net Carrying Amount | 7,423 | 15,827 |
Non-Compete Covenants [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 2,260 | 2,260 |
Accumulated Amortization | (2,260) | (2,260) |
Net Carrying Amount | $ 0 | $ 0 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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