Condensed Consolidated Income Statements - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
NET SALES	$ 352,014	$ 347,612	$ 1,062,206	$ 1,123,004
Cost of sales	335,967	323,939	973,042	995,781
GROSS PROFIT	16,047	23,673	89,164	127,223
Selling, general and administrative expenses	16,290	15,985	46,737	60,631
INCOME (LOSS) FROM OPERATIONS	(243)	7,688	42,427	66,592
Interest expense, net	(11,807)	(12,378)	(35,532)	(37,417)
Other income (expense), net	1,676	(3,238)	3,716	(6,796)
Change in fair value of redeemable preferred stock embedded derivative	(1,042)	214	(323)	(3,476)
INCOME (LOSS) BEFORE INCOME TAXES	(11,416)	(7,714)	10,288	18,903
Income tax (provision) benefit	4,785	7,051	(7,699)	(1,114)
NET INCOME (LOSS)	$ (6,631)	$ (663)	$ 2,589	$ 17,789
LOSS PER SHARE – BASIC	$ (0.57)	$ (0.37)	$ (0.84)	$ (0.32)
LOSS PER SHARE – DILUTED	$ (0.57)	$ (0.37)	$ (0.84)	$ (0.32)