Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
REVENUES:
Net sales	$ 76,317	$ 75,589	$ 225,316	$ 208,511
Other	141	148	409	451
TOTAL REVENUE	76,458	75,737	225,725	208,962
COST OF GOODS SOLD	40,884	41,705	119,324	115,876
Gross profit	35,574	34,032	106,401	93,086
OPERATING EXPENSES:
Selling, general and administrative	20,411	18,341	63,004	57,368
Research and development	1,877	1,067	6,420	2,937
Legal settlement	0	0	(2,500)	0
Total operating expenses	22,288	19,408	66,924	60,305
Income from operations	13,286	14,624	39,477	32,781
OTHER INCOME(EXPENSE)	132	(215)	966	40
Income before income taxes	13,418	14,409	40,443	32,821
PROVISION FOR INCOME TAXES	(4,157)	(5,434)	(13,616)	(11,878)
NET INCOME	$ 9,261	$ 8,975	$ 26,827	$ 20,943
NET INCOME PER SHARE
Basic (in dollars per share)	$ 0.66	$ 0.67	$ 1.94	$ 1.54
Diluted (in dollars per share)	$ 0.65	$ 0.65	$ 1.89	$ 1.51
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	13,932	13,489	13,826	13,605
Diluted (in shares)	14,184	13,752	14,169	13,838