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Related Party Transactions (Details) - USD ($)		3 Months Ended
	Mar. 30, 2019	Mar. 30, 2019	Mar. 31, 2018	May 01, 2019	Dec. 29, 2018
Related Party Transaction [Line Items]
Payments on long-term debt		$ (10,974,000)	$ (9,622,000)
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties		51,200,000	$ 33,100,000
Accounts Receivable, Related Parties, Current	$ 6,700,000	6,700,000			$ 8,000,000
Related Party Sales Eliminated		5,900,000
Deferred Revenue, Additions		1,000,000
Revolving Loan Agreement [Member] | Revolving Credit Facility [Member]
Related Party Transaction [Line Items]
Revolving Loan Agreement, Fair Value of Amount Outstanding	$ 0	$ 0
LIBO Rate [Member] | Revolving Loan Agreement [Member] | Revolving Credit Facility [Member]
Related Party Transaction [Line Items]
Basis spread on variable rate	2.50%
Subsequent Event | Revolving Loan Agreement [Member] | Revolving Credit Facility [Member]
Related Party Transaction [Line Items]
Revolving Loan Agreement, Maximum Borrowing Capacity				$ 50,000,000
Subsequent Event | Revolving Loan Agreement [Member] | Lender One [Member] | Revolving Credit Facility [Member]
Related Party Transaction [Line Items]
Revolving Loan Agreement, Maximum Borrowing Capacity				$ 25,000,000

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