Interim Financial Statements (Details Textuals) (USD $) In Thousands, unless otherwise specified	9 Months Ended			1 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013 USPB	Dec. 30, 2011 Membership Interest Purchase Agreement USPB
Controlling And Noncontrolling Interest [Line Items]
Name of acquiree				National Beef Packing Company, LLC (NBP)
Name of acquirer				Leucadia National Corporation (Leucadia)
Ownership in NBP sold to Leucadia National Corporation				56.2415%
Remaining membership interests in National Beef Packing Company, LLC (NBP)				15.0729%
Payments to Acquire Additional Interest in Subsidiaries	$ 1,507	$ 0	$ 1,500