Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 26, 2017
Income Statement [Abstract]
NET SALES	$ 386,448	$ 174,220
Cost of sales	336,457	154,808
Restructuring costs		208
Cost of sales, including restructuring costs	336,457	155,016
GROSS PROFIT	49,991	19,204
Selling, general and administrative expenses	22,357	15,260
INCOME FROM OPERATIONS	27,634	3,944
Interest expense, net	(11,857)	(296)
Other expense, net	(2,988)	(348)
Change in fair value of redeemable preferred stock embedded derivative	898
INCOME BEFORE INCOME TAXES	13,687	3,300
Income tax provision	(3,370)	(198)
NET INCOME	$ 10,317	$ 3,102
EARNINGS PER SHARE - BASIC	$ 0.07	$ 0.12
EARNINGS PER SHARE - DILUTED	0.07	0.12
DIVIDENDS DECLARED PER SHARE	$ 0.09	$ 0.18