Disclosures about Fair Values of Financial Instruments - Schedule of Fair Values of 2016 First Lien Term Loan, Senior Unsecured Notes and Contingent Consideration (Detail) - USD ($) $ in Thousands	Apr. 01, 2017	Dec. 31, 2016
Level 2 [Member] \| Senior Unsecured Notes [Member]
Fair Value
Fair value of debt	$ 408,000	$ 404,000
Level 2 [Member] \| 2016 First Lien Term Loan [Member]
Fair Value
Fair value of debt	$ 703,688	705,425
Level 3 [Member] \| Landshire [Member]
Fair Value
Contingent consideration at fair value		$ 9,875

Amount of liability recognized arising from contingent consideration in a business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

Name:	us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant