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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 15, 2020 | Sep. 26, 2020 | Dec. 31, 2019
Business Acquisition [Line Items] |  |  |
Intangible assets acquired |  | 7 years | 7 years
Business acquisition, goodwill, not deductible for tax purposes | $ 72,000 | $ 431,078 | $ 356,128
Developed technology trade name and customer relationships [member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets acquired | $ 7,000 |  |
Developed technology and customer list [member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets acquired | 10 years |  |
Trade names [member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets acquired | 3 years |  |
Andrew Alliance [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Aggregate consideration paid for acquird entity | $ 80,000 |  |
Business combination equity interest issued or issuable | 4,000 |  |
Business acquisition, goodwill, not deductible for tax purposes | $ 71,632 |  |

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