DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified			12 Months Ended								12 Months Ended										12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 25, 2011 Put Options Written [Member]		Dec. 30, 2012 Put Options Written [Member]		Dec. 30, 2012 Short Positions On Outstanding Future [Member]		Dec. 25, 2011 Short Positions On Outstanding Future [Member]		Dec. 30, 2012 Corn [Member]		Dec. 30, 2012 Corn [Member] Put Options Written [Member] Contracts		Dec. 25, 2011 Corn [Member] Put Options Written [Member] Contracts		Dec. 30, 2012 Corn [Member] Short Positions On Outstanding Future [Member] Contracts		Dec. 25, 2011 Corn [Member] Short Positions On Outstanding Future [Member] Contracts		Dec. 30, 2012 Soybean Meal [Member]		Dec. 30, 2012 Soybean Meal [Member] Short Positions On Outstanding Future [Member] Contracts		Dec. 25, 2011 Soybean Meal [Member] Short Positions On Outstanding Future [Member] Contracts
Fair values:
Commodity derivative assets	$ 1,821	$ 2,870
Commodity derivative liabilities	(1,530)	(2,723)
Cash collateral posted with (owed to) brokers	(166)	3,271
Fair value			$ (603)	[1]	$ 0	[1]	$ 1,464	[1]	$ 495	[1]
Derivatives Coverage:
Derivatives Coverage											0.00%	[2]									0.00%	[2]
Period through which stated percent of needs are covered:
Derivative, Maturity Date											Dec. 31, 2013	[2]									Dec. 31, 2013	[2]
Number of contracts:
Open Option Contracts Written, Expiration Date			Mar. 31, 2012	[1]
Open Option Contracts Written, Number of Contracts													0	[1]	500	[1]	584	[1]	2,531	[1]			269	[1]	96	[1]

[1] A written put option is an option that the Company has sold that grants the holder the right, but not the obligation, to sell the underlying asset at a certain price for a specified period of time. When the Company takes a short position on a futures derivative instrument, it agrees to sell the underlying asset in the future at a price established on the contract date. The Company writes put options and takes short positions on futures derivative instruments to minimize the impact of feed ingredients price volatility on its operating results.

[2] Derivatives coverage is the percent of anticipated corn and soybean meal needs covered by outstanding derivative instruments through a specified date. At December 25, 2011, the Company held short derivative positions that exceeded open long derivative positions for both corn and soybean meal. Short derivative positions are held to offset long forward cash purchases.