Related Party Transactions - Summarizes Purchases and Sales Arrangements between the Company and CCR (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Related Party Transaction [Line Items]
Purchases from	$ 257,039	$ 230,001	$ 207,768
CCR [Member] \| Transportation [Member]
Related Party Transaction [Line Items]
Sales to	2,036	21,940	16,523
CCR [Member] \| Production Agreement [Member]
Related Party Transaction [Line Items]
Purchases from	114,891	269,575	229,954
Gross sales to	$ 76,718	$ 72,568	$ 30,500

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999

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Balance Type:	credit
Period Type:	duration