Product Recall (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimated Insurance Recoveries	$ 2,656	$ 37,400
Loss Contingency Accrual	6,980	39,750
Sunflower Kernel Products [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimated Insurance Recoveries	47,500	$ 40,000
Insurance Recoveries	44,200
Insurance Policy Coverage	47,000
Insurance Settlements Receivable	2,700
Loss Contingency Accrual Payments	$ 40,500