Discontinued Operations (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended			12 Months Ended	15 Months Ended
	Jan. 19, 2016	Apr. 01, 2017	Apr. 02, 2016	Jan. 02, 2016	Dec. 31, 2016	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) gain on sale of discontinued operations before income taxes			$ 2,031
Packaging Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of discontinued operations	$ 89,600
Sale of discontinued operations, transaction costs	$ 6,300
(Loss) gain on sale of discontinued operations before income taxes		$ 2,000		$ (5,000)	$ 1,400	$ (3,600)
Sale of discontinued operations, impairment				$ 9,900