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Investment in Unconsolidated Subsidiary (Details) barrel in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2019 USD ($)	Jun. 29, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 29, 2019 USD ($) barrel	Jun. 30, 2018 USD ($)	Dec. 29, 2018 USD ($)	Jan. 21, 2011
Schedule of Equity Method Investments [Line Items]
Investment in the joint venture		$ 458,032		$ 458,032		$ 410,177
Income (loss) from equity method investments		38,175	$ 15,236	61,948	$ 112,390
Distributions of earnings from unconsolidated subsidiaries		17,700		$ 17,755	26,567
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		416,300		$ 416,300
Income (loss) from equity method investments		$ 38,100	$ 15,100	$ 62,400	112,300
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 unconsolidated subsidiaries	$ 37,800

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Processing Capability, Barrels of Fuel Per Day

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