DERIVATIVE FINANCIAL INSTRUMENTS (Schedule of Outstanding Derivative Instruments and Cash Collateral) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 29, 2015	Dec. 28, 2014
Fair values:
Cash collateral posted with brokers	19,448	25,205
Corn [Member]
Derivatives Coverage:
Derivatives coverage (as a percentage)	1.70%	(8.20%)
Period through which stated percent of needs are covered:
Maturity date	Dec. 31, 2016	Sep. 30, 2016
Soybean Meal [Member]
Derivatives Coverage:
Derivatives coverage (as a percentage)	(10.10%)	(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	4,338	8,416
Derivative liabilities, gross	(4,282)	(22,683)
Foreign Currency [Member]
Fair values:
Derivative assets, gross	899	2,563
Derivative liabilities, gross	(240)	0