Condensed Consolidated Statement of Operations and Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net sales	$ 273,410	$ 329,392	$ 566,124	$ 692,308
Costs and expenses:
Cost of materials (exclusive of depreciation and amortization)	201,461	240,681	420,892	504,648
Warehouse, processing and delivery expense	35,820	38,474	71,404	77,000
Sales, general and administrative expense	27,666	34,203	57,542	69,857
Restructuring charges	5,593		7,818	0
Depreciation and amortization expense	6,633	6,474	13,204	13,087
Operating (loss) income	(3,763)	9,560	(4,736)	27,716
Interest expense, net	(10,090)	(9,964)	(20,278)	(20,157)
Interest expense - unrealized loss on debt conversion option	0	(4,257)	0	(15,597)
Other income (expense)	745	(691)	(1,554)	(249)
Loss before income taxes and equity in earnings of joint venture	(13,108)	(5,352)	(26,568)	(8,287)
Income taxes	7,815	641	9,184	(3,732)
Loss before equity in earnings of joint venture	(5,293)	(4,711)	(17,384)	(12,019)
Equity in earnings of joint venture	1,494	1,733	2,963	4,741
Net loss	(3,799)	(2,978)	(14,421)	(7,278)
Basic loss per share	$ (0.16)	$ (0.13)	$ (0.62)	$ (0.32)
Diluted loss per share	$ (0.16)	$ (0.13)	$ (0.62)	$ (0.32)
Dividends per common share	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Comprehensive loss	$ (5,987)	$ (6,462)	$ (16,231)	$ (7,538)