Investment in Unconsolidated Subsidiary (Details) (USD $)	12 Months Ended			7 Months Ended	12 Months Ended
	Dec. 28, 2013 boe	Dec. 29, 2012	Dec. 31, 2011	Dec. 31, 2011 Diamond Green Diesel Holdings LLC Joint Venture [Member]	Dec. 28, 2013 Diamond Green Diesel Holdings LLC Joint Venture [Member]	Dec. 29, 2012 Diamond Green Diesel Holdings LLC Joint Venture [Member]	Jan. 21, 2011 Diamond Green Diesel Holdings LLC Joint Venture [Member]	Jan. 21, 2011 Valero Energy Corporation [Member] Diamond Green Diesel Holdings LLC Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Joint Venture Potential Barrels Of Fuel Per Day	9,300
Equity Method Investment, Ownership Percentage							50.00%	50.00%
Line of Credit Facility, Term				14 years
Term loan facility					$ 221,300,000
Darling's total contributions for constructing and funding Joint Venture					111,700,000
Investment in the joint venture	115,114,000	62,495,000			115,100,000
Loss from equity method investments	$ (7,660,000)	$ 2,662,000	$ 1,572,000		$ (7,700,000)	$ 2,700,000