UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Sales	$ 207,855	$ 172,249	$ 588,617	$ 486,533
Cost of sales	148,384	123,360	419,454	347,786
Gross profit	59,471	48,889	169,163	138,747
Selling, general and administrative expense	45,035	38,731	129,554	112,713
Operating income	14,436	10,158	39,609	26,034
Other income	4	29	40	243
Interest expense	(760)	(1,425)	(2,805)	(4,023)
Income before income taxes	13,680	8,762	36,844	22,254
Provision for income taxes	5,406	3,417	14,617	8,733
Net income	8,274	5,345	22,227	13,521
Preferred stock dividend	(23)	(23)	(68)	(68)
Net income attributable to common shareholders	$ 8,251	$ 5,322	$ 22,159	$ 13,453
Basic income per share (in dollars per share)	$ 0.58	$ 0.38	$ 1.55	$ 0.98
Weighted average common shares outstanding (in shares)	14,315	14,023	14,307	13,710
Diluted income per share (in dollars per share)	$ 0.55	$ 0.36	$ 1.47	$ 0.93
Weighted average common and common equivalent shares outstanding (in share)	15,155	15,056	15,147	14,764