Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUES:
Net sales	$ 301,642	$ 282,357	$ 228,431
Other	553	602	540
TOTAL REVENUE	302,195	282,959	228,971
COST OF GOODS SOLD	159,841	153,989	122,695
Gross profit	142,354	128,970	106,276
OPERATING EXPENSES:
Selling, general and administrative	85,287	76,636	68,205
Research and development	8,588	4,678	2,645
Legal settlement	(2,500)	0	0
Gain on sale of assets	(14,242)	0	0
Total operating expenses	77,133	81,314	70,850
Income from operations	65,221	47,656	35,426
OTHER INCOME	1,201	129	1,181
Income before income taxes	66,422	47,785	36,607
PROVISION FOR INCOME TAXES	(21,753)	(17,862)	(11,626)
NET INCOME	$ 44,669	$ 29,923	$ 24,981
NET INCOME PER SHARE
Basic	$ 3.23	$ 2.20	$ 1.70
Diluted	$ 3.15	$ 2.16	$ 1.67
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	13,835	13,611	14,720
Diluted (in shares)	14,161	13,855	14,984