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Acquisition - Proforma Income Statement (Details) - Cedar Creek - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Net sales	$ 3,262,433	$ 3,235,923
Net income (loss)	$ (18,129)	$ 32,690
Earnings (loss) per common share:
Basic (in dollars per share)	$ (1.83)	$ 3.61
Diluted (in dollars per share)	$ (1.83)	$ 3.54

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