Processing Capability, Barrels of Fuel Per Day

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Investment in Unconsolidated Subsidiary (Details) barrel in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 29, 2018 USD ($) barrel	Sep. 30, 2017 USD ($)	Dec. 30, 2017 USD ($)	Jan. 21, 2011
Schedule of Equity Method Investments [Line Items]
Investment in the joint venture	$ 398,794		$ 398,794		$ 302,038
Income (loss) from equity method investments	(2,792)	$ 7,703	109,598	$ 16,669
Distributions of earnings from unconsolidated subsidiaries			$ 27,418	26,600
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%
Processing cabaility \| barrel			20
Investment in the joint venture	358,600		$ 358,600
Income (loss) from equity method investments	$ (2,600)	$ 7,200	109,700	$ 15,900
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%