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Investment in Unconsolidated Subsidiary (Details) barrel in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017 USD ($)	Jul. 02, 2016 USD ($)	Jul. 01, 2017 USD ($) barrel	Jul. 02, 2016 USD ($)	Dec. 31, 2016 USD ($)	Jan. 21, 2011
Schedule of Equity Method Investments [Line Items]
Investment in the joint venture	$ 279,814		$ 279,814		$ 292,717
Income (loss) from equity method investments	8,260	$ 13,852	8,966	$ 19,495
Proceeds from Equity Method Investment, Distribution			$ 25,806	25,994
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage						50.00%
Processing cabaility | barrel			12
Line of credit term			14 years
Term loan facility	221,300		$ 221,300
Investment in the joint venture	$ 254,400		254,400
Income (loss) from equity method investments			8,700	$ 19,200
Proceeds from Equity Method Investment, Distribution			$ 25,000
Diamond Green Diesel Holdings LLC Joint Venture [Member] | Valero Energy Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage						50.00%

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