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Business Combinations - Purchase Price Allocation (Details) - USD ($) $ in Thousands | Oct. 01, 2021 | Jan. 22, 2021 | Dec. 31, 2021 | Sep. 30, 2021
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Fair Value of intangible Assets [Abstract] |  |  |  |
Goodwill |  |  | $ 2,260,407 | $ 2,216,553
Threat Stack |  |  |  |
Assets Acquired [Abstract] |  |  |  |
Deferred tax assets | $ 13,366 |  |  |
Other net tangible assets acquired, at fair value | 5,481 |  |  |
Cash, cash equivalents, and restricted cash | $ 912 |  |  |
Fair Value of intangible Assets [Abstract] |  |  |  |
Identifiable intangible assets useful life | 5 years |  |  |
Goodwill | $ 43,956 |  |  |
Total assets acquired | 79,515 |  |  |
Liabilities Assumed Abstract [Abstract] |  |  |  |
Deferred revenue | (10,591) |  |  |
Total liabilities assumed | (10,591) |  |  |
Net assets acquired | 68,924 |  |  |
Threat Stack | Developed Technology Rights |  |  |  |
Fair Value of intangible Assets [Abstract] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 11,400 |  |  |
Identifiable intangible assets useful life | 5 years |  |  |
Threat Stack | Customer Relationships |  |  |  |
Fair Value of intangible Assets [Abstract] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 4,400 |  |  |
Identifiable intangible assets useful life | 5 years |  |  |
Volterra [Member] |  |  |  |
Assets Acquired [Abstract] |  |  |  |
Other net tangible assets acquired, at fair value |  | $ 7,499 |  |
Cash, cash equivalents, and restricted cash |  | $ 14,012 |  |
Fair Value of intangible Assets [Abstract] |  |  |  |
Identifiable intangible assets useful life |  | 6 years 11 months 12 days |  |
Goodwill |  | $ 351,417 |  |
Total assets acquired |  | 432,928 |  |
Liabilities Assumed Abstract [Abstract] |  |  |  |
Total liabilities assumed |  | (5,686) |  |
Net assets acquired |  | 427,242 |  |
Volterra [Member] | Developed Technology Rights |  |  |  |
Fair Value of intangible Assets [Abstract] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | $ 59,500 |  |
Identifiable intangible assets useful life |  | 7 years |  |
Volterra [Member] | Customer Relationships |  |  |  |
Fair Value of intangible Assets [Abstract] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | $ 500 |  |
Identifiable intangible assets useful life |  | 1 year |  |

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