Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
REVENUES:
Net sales	$ 77,139	$ 77,661	$ 152,522	$ 148,999
Other	142	135	270	268
TOTAL REVENUE	77,281	77,796	152,792	149,267
COST OF GOODS SOLD	38,199	41,595	78,745	78,440
Gross profit	39,082	36,201	74,047	70,827
OPERATING EXPENSES:
Selling, general and administrative	22,806	19,730	43,696	42,593
Research and development	2,729	2,491	5,422	4,543
Legal settlement	0	0	0	(2,500)
Total operating expenses	25,535	22,221	49,118	44,636
Income from operations	13,547	13,980	24,929	26,191
OTHER INCOME(EXPENSE)	145	431	280	834
Income before income taxes	13,692	14,411	25,209	27,025
PROVISION FOR INCOME TAXES	(4,543)	(4,918)	(8,459)	(9,459)
NET INCOME	$ 9,149	$ 9,493	$ 16,750	$ 17,566
NET INCOME PER SHARE
Basic (in dollars per share)	$ 0.65	$ 0.69	$ 1.19	$ 1.28
Diluted (in dollars per share)	$ 0.63	$ 0.67	$ 1.16	$ 1.24
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	14,179	13,852	14,067	13,772
Diluted (in shares)	14,620	14,257	14,484	14,166