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Investment in Unconsolidated Subsidiary (Details) barrel in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2019 USD ($)	Sep. 28, 2019 USD ($)	Sep. 29, 2018 USD ($)	Sep. 28, 2019 USD ($) barrel	Sep. 29, 2018 USD ($)	Dec. 29, 2018 USD ($)	Jan. 21, 2011
Schedule of Equity Method Investments [Line Items]
Investment in the joint venture		$ 447,689		$ 447,689		$ 410,177
Income (loss) from equity method investments		(665)	$ (162)	(1,087)	$ (57)
Distributions of earnings from Diamond Green Diesel and other unconsolidated subsidiaries		55,400		$ 57,118	27,418
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		408,300		$ 408,300
Income (loss) from equity method investments		$ 32,000	$ (2,600)	$ 94,400	109,700
Income Tax Credits and Adjustments					$ 160,400
Diamond Green Diesel Holdings LLC Joint Venture [Member] | Valero Energy Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage							50.00%
Subsequent Event
Schedule of Equity Method Investments [Line Items]
Distributions of earnings from Diamond Green Diesel and other unconsolidated subsidiaries	$ 12,100

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Processing Capability, Barrels of Fuel Per Day

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