Acquisitions and Divestitures - Schedule of Unaudited Pro Forma Income From Operations (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Business Combinations [Abstract]
Income from operations as reported	$ 36,130	$ 39,801	$ 97,051	$ 106,938
Pro forma adjustments (unaudited)		11,073	9,328	49,761
Income from operations pro forma (unaudited)	$ 36,130	$ 50,874	$ 106,379	$ 156,699

Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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Balance Type:	credit
Period Type:	duration