CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
NET SALES	$ 103,948	$ 95,618
COST OF SALES	60,955	51,448
GROSS PROFIT	42,993	44,170
OPERATING EXPENSES:
Selling, general, and administrative	32,128	29,547
Research and development	9,108	6,441
Acquired in-process research and development	0	175
Total operating expenses	41,236	36,163
INCOME FROM OPERATIONS	1,757	8,007
OTHER INCOME (EXPENSE):
Interest income	57	48
Interest expense	(1,539)	(112)
Other expense	(63)	(26)
Other expense — net	(1,545)	(90)
INCOME BEFORE INCOME TAXES	212	7,917
INCOME TAX EXPENSE (BENEFIT)	(459)	2,169
NET INCOME	$ 671	$ 5,748
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.02	$ 0.14
Diluted (in dollars per share)	$ 0.02	$ 0.14
AVERAGE COMMON SHARES:
Basic (in shares)	42,520	41,999
Diluted (in shares)	42,835	42,436