Discontinued Operations (Operating results) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 03, 2015	Oct. 04, 2014	Oct. 03, 2015	Oct. 04, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Earnings (loss) from discontinued operations, net of taxes	$ (128)	$ 233	$ (262)	$ 297
Fiber And Starch Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues from discontinued operations	0	10,658	0	32,519
Earning (loss) before tax	(210)	382	(429)	487
Provision for (recovery of) income taxes during phase out	82	(149)	167	(190)
Earnings (loss) from discontinued operations, net of taxes	$ (128)	$ 233	$ (262)	$ 297

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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