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Related Party Transactions (Details) - USD ($)		3 Months Ended
	Feb. 23, 2015	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Related Party Transaction [Line Items]
Payments on long-term debt		$ (9,622,000)	$ (9,265,000)
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties		33,100,000	$ 35,700,000
Accounts Receivable, Related Parties, Current		8,800,000		$ 5,600,000
Related Party Sales Eliminated		7,100,000
Deferred Revenue, Additions		2,000,000
Revolving Loan Agreement [Member] | Revolving Credit Facility [Member]
Related Party Transaction [Line Items]
Revolving Loan Agreement, Maximum Borrowing Capacity	$ 10,000,000.0
Revolving Loan Agreement, Fair Value of Amount Outstanding		$ 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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