Business Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 01, 2017	Dec. 31, 2016
Business Combinations [Abstract]
Cash consideration for acquisition	$ 135,000	$ 123,000
Contingent consideration period	1 year
Earnout contingent consideration paid for business acquisition	$ 6,000
Contingent consideration included as part of fair value of assets and liabilities as on acquisition date	5,000
Aggregate contingent consideration outstanding for acquisition	8,000
Estimated fair value of earnout liabilities	$ 2,000