CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
NET SALES	$ 95,618	$ 86,631
COST OF SALES	51,448	46,846
GROSS PROFIT	44,170	39,785
OPERATING EXPENSES:
Selling, general, and administrative	29,547	24,591
Research and development	6,441	4,984
Acquired in-process research and development	175	0
Total operating expenses	36,163	29,575
INCOME FROM OPERATIONS	8,007	10,210
OTHER INCOME (EXPENSE):
Interest income	48	2
Interest expense	(112)	(425)
Other income	(26)	11
Other income (expense) - net	(90)	(412)
INCOME BEFORE INCOME TAXES	7,917	9,798
INCOME TAX EXPENSE	2,169	3,159
NET INCOME	$ 5,748	$ 6,639
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.14	$ 0.19
Diluted (in dollars per share)	$ 0.14	$ 0.18
AVERAGE COMMON SHARES:
Basic (in shares)	41,999	35,593
Diluted (in shares)	42,436	36,254