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Acquisitions - Schedule of Acquired Intangible Assets (Details) - USD ($) $ in Thousands | Apr. 15, 2019 | Feb. 08, 2018 | Sep. 29, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill |  |  | $ 1,265,006 | $ 1,557,653
Opterna International Corp. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization | $ 28,000 |  |  |
Goodwill | 35,565 |  |  |
Total intangible assets | $ 63,565 |  |  |
Amortization Period | 12 years 10 months 24 days |  |  |
Opterna International Corp. | Goodwill |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 35,565 |  |  |
Opterna International Corp. | Developed technologies |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization | $ 3,400 |  |  |
Amortization Period | 5 years |  |  |
Opterna International Corp. | Customer relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization | $ 22,800 |  |  |
Amortization Period | 15 years |  |  |
Opterna International Corp. | Sales backlog |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization | $ 1,300 |  |  |
Amortization Period | 15 days |  |  |
Opterna International Corp. | Trademarks |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization | $ 500 |  |  |
Amortization Period | 2 years |  |  |
Snell Advanced Media |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization |  | $ 51,000 |  |
Goodwill |  | 103,466 |  |
Total intangible assets |  | $ 154,466 |  |
Amortization Period |  | 6 years 2 months 12 days |  |
Snell Advanced Media | Goodwill |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | $ 103,466 |  |
Snell Advanced Media | Developed technologies |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization |  | $ 36,500 |  |
Amortization Period |  | 5 years |  |
Snell Advanced Media | Customer relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization |  | $ 11,000 |  |
Amortization Period |  | 12 years |  |
Snell Advanced Media | Sales backlog |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization |  | $ 1,900 |  |
Amortization Period |  | 9 days |  |
Snell Advanced Media | Trademarks |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total intangible assets subject to amortization |  | $ 1,600 |  |
Amortization Period |  | 27 days |  |

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