CONSOLIDATED CONDENSED STATEMENTS OF INCOME (Unaudited) (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
Statement of Income
Net sales	$ 172,814	$ 172,195	$ 539,500	$ 529,646
Cost of sales	81,503	83,212	261,018	255,185
Gross profit	91,311	88,983	278,482	274,461
Selling and administrative expense	68,350	66,091	206,290	208,137
Research and development expense	7,021	7,399	21,499	21,522
Other expense	0	291	792	1,261
Total operating expenses	75,371	73,781	228,581	230,920
Income from operations	15,940	15,202	49,901	43,541
Loss on early extinguishment of debt	0	0	0	79
Amortization of debt discount	1,131	1,059	3,338	3,167
Interest expense	1,670	1,749	5,182	5,269
Income before income taxes	13,139	12,394	41,381	35,026
Provision for income taxes	4,928	3,636	15,495	11,643
Net income	$ 8,211	$ 8,758	$ 25,886	$ 23,383
Per share data:
Net Income Basic	$ 0.29	$ 0.31	$ 0.91	$ 0.81
Net Income Diluted	$ 0.29	$ 0.31	$ 0.90	$ 0.80
Weighted average common shares Basic	28,348	28,425	28,355	28,896
Weighted average common shares Diluted	28,546	28,521	28,734	29,073