CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
NET SALES	$ 109,875	$ 100,532	$ 213,823	$ 196,150
COST OF SALES	62,890	53,508	123,845	104,956
GROSS PROFIT	46,985	47,024	89,978	91,194
OPERATING EXPENSES:
Selling, general, and administrative	31,557	30,211	63,685	59,758
Research and development	8,648	6,591	17,756	13,032
Acquired in-process research and development	0	2,000	0	2,175
Total operating expenses	40,205	38,802	81,441	74,965
INCOME FROM OPERATIONS	6,780	8,222	8,537	16,229
OTHER INCOME (EXPENSE):
Interest income	74	71	131	119
Interest expense	(1,842)	(112)	(3,381)	(224)
Other income (expense)	(7)	633	(70)	607
Other income (expense) — net	(1,775)	592	(3,320)	502
INCOME BEFORE INCOME TAXES	5,005	8,814	5,217	16,731
INCOME TAX EXPENSE	1,253	2,719	794	4,888
NET INCOME	$ 3,752	$ 6,095	$ 4,423	$ 11,843
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.09	$ 0.14	$ 0.10	$ 0.28
Diluted (in dollars per share)	$ 0.09	$ 0.14	$ 0.10	$ 0.28
AVERAGE COMMON SHARES:
Basic (in shares)	42,562	42,048	42,541	42,028
Diluted (in shares)	42,670	42,469	42,753	42,457