Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 2,068,188	$ 2,353,523	$ 2,480,962
Cost of sales, including warehousing, distribution and occupancy	1,353,806	1,581,778	1,656,540
Gross profit	714,382	771,745	824,422
Selling, general, and administrative	566,457	620,885	624,269
Long-lived asset impairments	0	38,236	457,794
Loss on net asset exchange for the formation of the joint ventures	21,293	0	0
Other loss (income), net	1,889	271	(825)
Operating income (loss)	124,743	112,353	(256,816)
Interest expense, net	106,709	127,080	64,221
Gain on convertible debt and debt refinancing costs	(3,214)	0	(10,996)
Loss on debt refinancing	0	16,740	0
Loss (gain) on forward contracts for the issuance of convertible preferred stock	16,787	(88,942)	0
Income (loss) before income taxes and income from equity method investments	4,461	57,475	(310,041)
Income tax expense (benefit)	44,869	(12,305)	(159,779)
Net (loss) income before income from equity method investments	(40,408)	69,780	(150,262)
Income from equity method investments	5,296	0	0
Net (loss) income before income from equity method investments	$ (35,112)	$ 69,780	$ (150,262)
(Loss) earnings per share
Basic (in USD per share)	$ (0.64)	$ 0.83	$ (2.18)
Diluted (in USD per share)	$ (0.64)	$ 0.81	$ (2.18)
Weighted average common shares outstanding
Basic (in shares)	83,720	83,364	68,789
Diluted (in shares)	83,720	86,171	68,789