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		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Total Assets	$ 497,146		$ 497,146
Partners' Capital	242,535		242,535
Revenues	148,064	42	267,721	42
Net Income	$ 2,958	$ (3,923)	$ 12,307	$ (6,314)