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Acquisition - Proforma Income Statement (Details) - Cedar Creek - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Business Acquisition [Line Items]
Net sales	$ 638,701	$ 784,267
Net loss	$ (3,294)	$ (9,109)
Earnings (loss) per common share:
Basic (in dollars per share)	$ (0.35)	$ (1.00)
Diluted (in dollars per share)	$ (0.35)	$ (1.00)

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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