Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income [Abstract]
Net sales	$ 304,039	$ 294,860	$ 996,347	$ 850,216
Costs and expenses:
Cost of materials (exclusive of depreciation and amortization)	218,015	221,690	722,663	631,588
Warehouse, processing and delivery expense	36,894	35,076	113,894	102,092
Sales, general and administrative expense	30,319	30,060	100,425	92,045
Depreciation and amortization expense	6,263	4,861	19,350	14,919
Operating income	12,548	3,173	40,015	9,572
Interest expense, net	(10,280)	(1,221)	(30,437)	(3,327)
Interest expense - unrealized loss on debt conversion option	0		(15,597)
Income (loss) before income taxes and equity in earnings of joint venture	2,268	1,952	(6,019)	6,245
Income taxes	(453)	(1,266)	(4,185)	(5,000)
Income (loss) before equity in earnings of joint venture	1,815	686	(10,204)	1,245
Equity in earnings of joint venture	1,358	3,117	6,099	8,958
Net income (loss)	3,173	3,803	(4,105)	10,203
Basic income (loss) per share	$ 0.14	$ 0.17	$ (0.18)	$ 0.45
Diluted income (loss) per share	$ 0.13	$ 0.16	$ (0.18)	$ 0.44
Dividends per common share
Comprehensive income (loss)	$ 6,123	$ (385)	$ (1,415)	$ 8,212