Investment in Unconsolidated Subsidiary (Details) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013	Jun. 28, 2014 Diamond Green Diesel Holdings LLC Joint Venture [Member] boe	Jun. 29, 2013 Diamond Green Diesel Holdings LLC Joint Venture [Member]	Jan. 21, 2011 Diamond Green Diesel Holdings LLC Joint Venture [Member]	Jan. 21, 2011 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%	50.00%
Joint Venture Potential Barrels Of Fuel Per Day						9,300
Line of credit term						14 years
Term loan facility						$ 221,300,000
Investment in the joint venture	147,662,000		147,662,000		115,114,000	121,300,000
Income (loss) from equity method investments	$ 2,040,000	$ (1,962,000)	$ 7,117,000	$ (3,157,000)		$ 6,200,000	$ (3,200,000)