Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Consolidated Statements of Comprehensive (Loss) Income
Net sales	$ 1,301,197	$ 1,373,334	$ 3,845,629	$ 4,131,896
Cost of sales	(1,237,812)	(1,279,976)	(3,630,297)	(3,849,743)
Gross profit	63,385	93,358	215,332	282,153
Selling, general and administrative expenses	(74,993)	(83,419)	(238,677)	(255,705)
Goodwill impairments	(122,076)		(244,967)
Impairments of definite-lived intangible assets	(34,173)		(52,152)
(Loss) income from operations	(167,857)	9,939	(320,464)	26,448
Other (expense) income:
Interest expense	(11,659)	(10,179)	(32,044)	(30,998)
Impairment of non-consolidated entities		(286)		(329)
Other	149	574	431	1,385
Total other expense	(11,510)	(9,891)	(31,613)	(29,942)
(Loss) income before income taxes	(179,367)	48	(352,077)	(3,494)
Income tax benefit (expense)	2,087	121	1,034	(750)
Net (loss) income	(177,280)	169	(351,043)	(4,244)
Other comprehensive (loss) income, net of tax	(307)	918	(5,792)	(44)
Total comprehensive (loss) income	$ (177,587)	$ 1,087	$ (356,835)	$ (4,288)
(Loss) income per common share, basic and diluted	$ (2.35)	$ 0.00	$ (4.69)	$ (0.06)
Basic (in shares)	75,509,088	74,386,386	74,904,776	74,181,869
Diluted (in shares)	75,509,088	74,741,511	74,904,776	74,181,869