CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 7,710,226	$ 8,121,661	$ 9,503,196
Cost of sales	5,722,710	6,147,252	7,829,733
Gross profit	1,987,516	1,974,409	1,673,463
Operating costs and expenses:
Selling and distribution	1,348,349	1,379,317	1,355,053
General and administrative	346,028	350,324	288,744
Amortization of intangibles	20,752	21,653	2,889
Facility closing and reorganization costs, net	8,719	19,844	4,460
Litigation settlements	0	0	(2,521)
Impairment of intangible and long-lived assets	0	109,910	20,820
Other operating income	0	0	(4,535)
Total operating costs and expenses	1,723,848	1,881,048	1,664,910
Operating income	263,668	93,361	8,553
Other (income) expense:
Interest expense	66,795	66,813	61,019
Loss on early retirement of long-term debt	0	43,609	1,437
Other income, net	(5,778)	(3,751)	(1,620)
Total other expense	61,017	106,671	60,836
Income (loss) from continuing operations before income taxes	202,651	(13,310)	(52,283)
Income tax expense (benefit)	82,034	(5,229)	(32,096)
Income (loss) from continuing operations	120,617	(8,081)	(20,187)
Loss from discontinued operations, net of tax	(312)	(1,095)	(652)
Gain (loss) on sale of discontinued operations, net of tax	(376)	668	543
Net income (loss)	$ 119,929	$ (8,508)	$ (20,296)
Average common shares:
Basic (in shares)	90,933,886	93,298,467	93,916,656
Diluted (in shares)	91,510,483	93,298,467	93,916,656
Basic income (loss) per common share:
Income (loss) from continuing operations (in dollars per share)	$ 1.33	$ (0.09)	$ (0.22)
Loss from discontinued operations (in dollars per share)	(0.01)	0.00	0.00
Net income (loss) (in dollars per share)	1.32	(0.09)	(0.22)
Diluted income (loss) per common share:
Income (loss) from continuing operations (in dollars per share)	1.32	(0.09)	(0.22)
Loss from discontinued operations (in dollars per share)	(0.01)	0.00	0.00
Net income (loss) (in dollars per share)	$ 1.31	$ (0.09)	$ (0.22)