UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Sales	$ 197,675	$ 167,292	$ 380,762	$ 314,284
Cost of sales	140,410	119,389	271,070	224,426
Gross profit	57,265	47,903	109,692	89,858
Selling, general and administrative expense	43,634	38,774	84,519	73,982
Operating income	13,631	9,129	25,173	15,876
Other income	15	11	36	214
Interest expense	(1,023)	(1,604)	(2,045)	(2,598)
Income before income taxes	12,623	7,536	23,164	13,492
Provision for income taxes	5,013	2,952	9,211	5,316
Net income	7,610	4,584	13,953	8,176
Preferred stock dividend	(22)	(22)	(45)	(45)
Net income attributable to common shareholders	$ 7,588	$ 4,562	$ 13,908	$ 8,131
Basic income per share	$ 0.53	$ 0.33	$ 0.97	$ 0.60
Weighted average common shares outstanding	14,327	13,938	14,303	13,551
Diluted income per share	$ 0.50	$ 0.31	$ 0.92	$ 0.57
Weighted average common and common equivalent shares outstanding	15,167	15,198	15,143	14,615