Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net sales	$ 351,316	$ 365,070	$ 378,160
Cost of sales	334,268	360,085	362,325
Gross profit	17,048	4,985	15,835
Selling, general and administrative expense	32,084	34,172	40,811
Other expense (income), net	499	9,904	(1,951)
Operating loss	(15,535)	(39,091)	(23,025)
Interest expense, net	51,115	46,389	43,064
Loss on extinguishment of debt			5,951
Non-operating other expense (income), net	10	(1,139)	(1,554)
Loss before provision (benefit) for income taxes	(66,660)	(84,341)	(70,486)
Provision (benefit) for income taxes	(4,749)	(20,924)	1,740
Net loss	(61,911)	(63,417)	(72,226)
Dividends on convertible preferred stocks	300	300	300
Net loss attributable to common stockholders	$ (99,419)	$ (96,441)	$ (102,741)
Basic and diluted net loss per common share	$ (3.53)	$ (3.44)	$ (3.74)
Series E Preferred Stock [Member]
Dividends on Series E redeemable preferred stock	$ 35,182	$ 30,729	$ 26,840
Accretion of Series E redeemable preferred stock	$ 2,026	$ 1,995	$ 3,375