Voluntary Reorganization under Chapter 11 - Condensed Statement of Operations of Debtors-in-Possession (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Income Statements, Captions [Line Items]
Net sales	$ 1,840,021	$ 1,849,710	$ 1,843,498	$ 1,795,434	$ 1,929,480	$ 1,894,066	$ 1,951,230	$ 1,980,507	$ 7,328,663	$ 7,755,283	$ 7,795,025
Cost of sales									5,888,931	6,100,005	5,976,958
Gross profit	336,158	350,341	379,480	373,753	383,394	390,597	432,784	448,503	1,439,732	1,655,278	1,818,067
Operating costs and expenses:
Selling and distribution									1,327,922	1,403,178	1,346,417
General and administrative									301,355	277,659	307,793
Amortization of intangibles									20,600	20,456	20,710
Prepetition facility closing and restructuring costs, net									17,017	74,992	24,913
Impairment of goodwill and long-lived assets									177,357	204,414	30,668
Equity in (earnings) loss of unconsolidated affiliate									(4,835)	(7,939)	0
Total operating costs and expenses									1,839,416	1,970,471	1,730,501
Operating income (loss)									(399,684)	(315,193)	87,566
Other (income) expense:
Interest expense									68,730	56,443	64,961
Other (income) expense, net									(3,012)	2,877	1,362
Reorganization items	44,500								44,527	0	0
Total other expense									110,245	59,320	66,323
Income (loss) before income taxes									(509,929)	(374,513)	21,243
Income tax benefit									(9,195)	(42,283)	(26,179)
Income (loss) from continuing operations	(294,651)	(79,393)	(64,863)	(61,827)	(263,301)	(26,648)	(42,016)	(265)	(500,734)	(332,230)	47,422
Gain (loss) on sale of discontinued operations, net of tax									(70)	4,872	2,875
Net income (loss)	$ (294,721)	$ (79,393)	$ (64,863)	$ (61,827)	$ (260,351)	$ (26,648)	$ (40,094)	$ (265)	(500,804)	$ (327,358)	$ 61,588
Debtors-in-Possession
Condensed Income Statements, Captions [Line Items]
Net sales									7,294,610
Cost of sales									5,864,267
Gross profit									1,430,343
Operating costs and expenses:
Selling and distribution									1,319,050
General and administrative									298,132
Amortization of intangibles									20,314
Prepetition facility closing and restructuring costs, net									17,017
Impairment of goodwill and long-lived assets									177,357
Equity in (earnings) loss of unconsolidated affiliate									(4,835)
Equity in (earnings) loss of nondebtor subsidiaries									347
Total operating costs and expenses									1,827,382
Operating income (loss)									(397,039)
Other (income) expense:
Interest expense									69,809
Other (income) expense, net									(2,253)
Reorganization items									44,527
Total other expense									112,083
Income (loss) before income taxes									(509,122)
Income tax benefit									(8,532)
Income (loss) from continuing operations									(500,590)
Gain (loss) on sale of discontinued operations, net of tax									(70)
Net income (loss)									$ (500,660)