DERIVATIVE FINANCIAL INSTRUMENTS (Schedule of Outstanding Derivative Instruments and Cash Collateral) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 28, 2015	Dec. 28, 2014
Fair values:
Cash collateral posted with brokers	$ 10,845	$ 25,205
Corn [Member]
Derivatives Coverage:
Derivatives coverage (as a percentage)	2.30%	(8.20%)
Period through which stated percent of needs are covered:
Maturity date	Mar. 31, 2017	Sep. 30, 2016
Soybean Meal [Member]
Derivatives Coverage:
Derivatives coverage (as a percentage)	(11.10%)	(16.10%)
Period through which stated percent of needs are covered:
Maturity date	Dec. 31, 2015	Jul. 31, 2015
Commodity [Member]
Fair values:
Derivative assets, gross	$ 20,401	$ 8,416
Derivative liabilities, gross	(21,118)	(22,683)
Foreign Currency [Member]
Fair values:
Derivative assets, gross	0	2,563
Derivative liabilities, gross	$ (87)	$ 0