Acquisitions - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 11, 2015	Jul. 05, 2015	Dec. 31, 2015	Jul. 05, 2015	Jul. 03, 2016	Jul. 05, 2015
Business Acquisition [Line Items]
Payments of contingent consideration					$ 11,697,000
Universal Robots
Business Acquisition [Line Items]
Total purchase price	$ 315,437,000
Cash paid to acquire outstanding common and preferred stock	283,800,000
Contingent consideration	31,600,000
Arrangement range of outcomes value high	65,000,000
Payments of contingent consideration					$ 15,000,000
EBITDA contingent consideration amount, percentage					100.00%
Decrease in goodwill			$ (5,400,000)
Contingent consideration adjustment			(2,200,000)
Increase in intangible assets			1,600,000
Decrease in acquired liabilities			$ (1,600,000)
Goodwill, not deductible for tax purposes	$ 221,100,000
Revenues		$ 3,700,000
Income (loss) before income taxes		$ (1,700,000)
Net income				$ 99,719,000		$ 126,644,000
Universal Robots | Fair Value Adjustment to Inventory
Business Acquisition [Line Items]
Net income				600,000		600,000
Universal Robots | Acquisition Related Costs
Business Acquisition [Line Items]
Net income				$ 1,000,000		$ 1,000,000