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Fair Value Measurements - Additional Information (Details) $ in Thousands, € in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) | Sep. 28, 2018 USD ($) Installment | Dec. 31, 2017 USD ($) | Dec. 14, 2016 USD ($) | Dec. 14, 2016 EUR (€) | Feb. 19, 2015 USD ($)
Video Signal Processing and Management Technologies |  |  |  |  |  |  |
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |
Date of Acquisition Agreement |  |  | Dec. 14, 2016 |  |  |  |
Number of contingent consideration installments | Installment |  |  | 4 |  |  |  |
Undiscounted range of outcomes, minimum |  |  |  |  | $ 0 |  |
Undiscounted range of outcomes, maximum |  |  |  |  | $ 6,600 | € 5.5 |
Video Signal Processing and Management Technologies | Long-term Liability in Other Liabilities |  |  |  |  |  |  |
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |
Estimated fair value of contingent consideration |  |  | $ 2,400 | $ 1,300 |  |  |
Applimotion Inc. |  |  |  |  |  |  |
Business Acquisition Contingent Consideration [Line Items] |  |  |  |  |  |  |
Number of contingent consideration installments | Installment |  |  | 2 |  |  |  |
Estimated fair value of contingent consideration |  |  |  | $ 2,800 |  |  | $ 1,000
Business combination, date of agreement |  |  | Feb. 19, 2015 |  |  |  |
Name of acquired entity |  |  | Applimotion Inc |  |  |  |
Payments of contingent consideration | $ 2,800 | $ 1,200 |  |  |  |  |

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