CONSOLIDATED STATEMENTS OF OPERATIONS (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
NET SALES	$ 100,532	$ 91,249	$ 196,150	$ 177,880
COST OF SALES	53,508	48,765	104,956	95,611
GROSS PROFIT	47,024	42,484	91,194	82,269
OPERATING EXPENSES:
Selling, general, and administrative	30,211	26,175	59,758	50,766
Research and development	6,591	5,462	13,032	10,446
Acquired in-process research and development	2,000	0	2,175	0
Total operating expenses	38,802	31,637	74,965	61,212
INCOME FROM OPERATIONS	8,222	10,847	16,229	21,057
OTHER INCOME (EXPENSE):
Interest income	71	14	119	16
Interest expense	(112)	(311)	(224)	(736)
Other income	633	68	607	79
Other income (expense) - net	592	(229)	502	(641)
INCOME BEFORE INCOME TAXES	8,814	10,618	16,731	20,416
INCOME TAX EXPENSE	2,719	3,746	4,888	6,905
NET INCOME	$ 6,095	$ 6,872	$ 11,843	$ 13,511
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.14	$ 0.19	$ 0.28	$ 0.37
Diluted (in dollars per share)	$ 0.14	$ 0.18	$ 0.28	$ 0.37
AVERAGE COMMON SHARES:
Basic (in shares)	42,048	36,804	42,028	36,199
Diluted (in shares)	42,469	37,677	42,457	36,966