Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands		9 Months Ended
	Sep. 29, 2015	Oct. 31, 2016
Zinc Ahead Inc [Member]
Business Acquisition [Line Items]
Business acquisition date		Sep. 29, 2015
Closing cash consideration for purchase	$ 119,935
Business acquisition deferred consideration		$ 4,800
Business acquisition deferred consideration payment period	3 years
Deferred consideration annual payment rate	33.33%
Business acquisition-related transaction costs		$ 2,200
Maximum [Member]
Business Acquisition [Line Items]
Measurement Period For Goodwill Adjustment		1 year