Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net revenue	$ 1,807,719	$ 2,376,705	$ 3,930,412	$ 4,727,544
Cost of goods sold	1,538,312	2,090,187	3,392,445	4,164,407
Gross margin	269,407	286,518	537,967	563,137
Distribution, selling and administrative expenses	241,734	264,215	495,782	519,326
Acquisition-related and exit and realignment charges	6,054	5,390	12,118	10,254
Other operating (income) expense, net	(577)	1,014	(2,886)	1,056
Operating income	22,196	15,899	32,953	32,501
Interest expense, net	21,605	26,048	44,948	51,506
Other (income) expense, net	(4,552)	731	294	3,464
Income (loss) from continuing operations before income taxes	5,143	(10,880)	(12,289)	(22,469)
Income tax provision (benefit)	4,982	(1,146)	(3,541)	(1,816)
Income (loss) from continuing operations, net of tax	161	(9,734)	(8,748)	(20,653)
Loss from discontinued operations, net of tax	(55,788)	(742)	(58,203)	(3,919)
Net loss	$ (55,627)	$ (10,476)	$ (66,951)	$ (24,572)
Loss from continuing operations per common share: basic and diluted (in usd per share)	$ 0	$ (0.16)	$ (0.14)	$ (0.34)
Loss from discontinued operations per common share: basic and diluted (in usd per share)	(0.91)	(0.01)	(0.96)	(0.07)
Net loss per common share: basic and diluted (in usd per share)	$ (0.91)	$ (0.17)	$ (1.10)	$ (0.41)