Condensed Consolidated Income Statements - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
NET SALES	$ 357,693	$ 386,448
Cost of sales	324,571	336,457
GROSS PROFIT	33,122	49,991
Selling, general and administrative expenses	14,483	22,357
INCOME FROM OPERATIONS	18,639	27,634
Interest expense, net	(11,873)	(11,857)
Other expense, net	(499)	(2,988)
Change in fair value of redeemable preferred stock embedded derivative	626	898
INCOME BEFORE INCOME TAXES	6,893	13,687
Income tax provision	(4,943)	(3,370)
NET INCOME	$ 1,950	$ 10,317
EARNINGS (LOSS) PER SHARE – BASIC	$ (0.24)	$ 0.07
EARNINGS (LOSS) PER SHARE – DILUTED	$ (0.24)	$ 0.07