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Quantitative Information Associated With Fair Value Measurement of Level 3 Financial Instrument (Detail) - USD ($) $ in Thousands | 6 Months Ended |
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Jul. 01, 2018 | Apr. 25, 2018
Mobile Industrial Robots (MiR) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Contingent consideration |  | $ 51,400
Monte Carlo Simulation | Revenue for the period July 1, 2015-December 31, 2018 | Universal Robots (UR) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Target achievement, volatility | 11.40% |
Discount Rate | 3.20% |
Monte Carlo Simulation | Revenue for the period July 1, 2015-December 31, 2018 | Universal Robots (UR) | Significant Unobservable Inputs (Level 3) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Contingent consideration | $ 12,081 |
Monte Carlo Simulation | Revenue for the period January 1, 2018-December 31, 2018 | Mobile Industrial Robots (MiR) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Target achievement, volatility | 18.00% |
Discount Rate | 0.50% |
Monte Carlo Simulation | Revenue for the period January 1, 2018-December 31, 2018 | Mobile Industrial Robots (MiR) | Significant Unobservable Inputs (Level 3) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Contingent consideration | $ 48,833 |

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