Processing Capability, Barrels of Fuel Per Day

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Investment in Unconsolidated Subsidiary (Details) barrel in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Jun. 30, 2018 USD ($) barrel	Jul. 01, 2017 USD ($)	Dec. 30, 2017 USD ($)	Jan. 21, 2011
Schedule of Equity Method Investments [Line Items]
Investment in the joint venture	$ 399,097		$ 399,097		$ 302,038
Income (loss) from equity method investments	15,236	$ 8,260	112,390	$ 8,966
Distributions of earnings from unconsolidated subsidiaries			$ 26,567	25,806
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%
Processing cabaility \| barrel			12
Investment in the joint venture	361,200		$ 361,200
Income (loss) from equity method investments	$ 15,100	$ 8,100	112,300	$ 8,700
Income Tax Credits and Adjustments			160,400
Distributions of earnings from unconsolidated subsidiaries			$ 25,000
Diamond Green Diesel Holdings LLC Joint Venture [Member] \| Valero Energy Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%