Investment in Unconsolidated Subsidiary (Selected Financial Information) (Details) (Diamond Green Diesel Holdings LLC Joint Venture [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Total Assets	$ 481,954		$ 481,954		$ 488,435
Partners' Capital	239,573		239,573		230,228
Revenues	80,206	96,475	347,926	96,517
Net Income	$ (2,962)	$ 23,907	$ 9,344	$ 17,593