CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF INCOME [Abstract]
NET SALES	$ 437,367	$ 307,822	$ 278,232
Cost of goods sold	371,623	263,514	248,594
GROSS PROFIT	65,744	44,308	29,638
Operating expenses:
Warehouse and delivery	15,782	13,645	11,699
Selling, general and administrative	21,637	16,603	13,835
Amortization of intangible assets	1,523	829	564
Gain on sale of fixed assets and acquisition of business	(238)	(244)	(2,866)
Total operating expenses	38,704	30,833	23,232
OPERATING INCOME	27,040	13,475	6,406
Stock warrants revaluation	1,731	699	(261)
Interest expense, net	4,037	4,469	5,522
Income before income tax credit	21,272	8,307	1,145
Income tax credit	(6,823)	(163)	(81)
NET INCOME	$ 28,095	$ 8,470	$ 1,226
Basic net income per common share (in dollars per share)	$ 2.66	$ 0.87	$ 0.13
Diluted net income per common share (in dollars per share)	$ 2.64	$ 0.83	$ 0.12
Weighted average shares outstanding - basic (in shares)	10,558	9,757	9,351
Weighted average shares outstanding - diluted (in shares)	10,637	10,156	9,863