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Pro Forma Results Under Acquisition (Detail) - Universal Robots - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jul. 05, 2015 | Jul. 05, 2015
Business Acquisition [Line Items] |  |
Revenue | $ 520,217 | $ 873,188
Net income | $ 99,719 | $ 126,644
Net income per common share, basic | $ 0.47 | $ 0.54
Net income per common share, diluted | $ 0.46 | $ 0.58

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