Schedule of Changes in Fair Value of Level 3 Contingent Consideration (Parenthetical) (Detail) $ in Thousands	3 Months Ended
	Apr. 03, 2016 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Payments of contingent consideration	$ 11,697
Increase in contingent consideration	1,173
Universal Robots
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Payments of contingent consideration	$ 15,000
EBITDA contingent consideration amount, percentage	100.00%
Increase in contingent consideration	$ 1,200