Related Party Transactions - Summarizes Purchases and Sales Arrangements between the Company and CCR (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Related Party Transaction [Line Items]
Purchases from	$ 70,948	$ 66,611	$ 210,342	$ 191,709
CCR [Member] | Production Agreement [Member]
Related Party Transaction [Line Items]
Purchases from		20,157		110,451
Gross sales to		$ 11,873		$ 72,930