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Related Party Transactions (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 23, 2015	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014	Jan. 03, 2015
Related Party Transaction [Line Items]
Payments on long-term debt				$ (583,736,000)	$ (287,066,000)
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties		$ 44,400,000	$ 42,000,000	83,000,000	$ 83,600,000
Accounts Receivable, Related Parties, Current		7,100,000		7,100,000		$ 6,100,000
Related Party Sales Eliminated				6,000,000
Deferred Revenue, Additions				1,400,000
Revolving Loan Agreement [Member] | Revolving Credit Facility [Member]
Related Party Transaction [Line Items]
Revolving Loan Agreement, Maximum Borrowing Capacity	$ 10,000,000
Payments on long-term debt				(3,500,000)
Revolving Loan Agreement, Fair Value of Amount Outstanding		$ 0		$ 0
Revolving Loan Agreement [Member] | Lender One [Member] | Revolving Credit Facility [Member]
Related Party Transaction [Line Items]
Revolving Loan Agreement, Maximum Borrowing Capacity	$ 5,000,000.0
LIBO Rate [Member] | Revolving Loan Agreement [Member] | Revolving Credit Facility [Member]
Related Party Transaction [Line Items]
Basis spread on variable rate	2.50%

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