CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
NET SALES	$ 156,975	$ 136,086	$ 446,123	$ 403,745
COST OF SALES	89,160	76,881	251,354	228,271
GROSS PROFIT	67,815	59,205	194,769	175,474
OPERATING EXPENSES:
Selling, general and administrative	53,198	39,201	138,556	115,407
Research and development	11,424	10,515	33,440	29,389
Contingent consideration (benefit) expense	(94)	(58)	99	185
Acquired in-process research and development	300	1,000	400	1,000
Total operating expenses	64,828	50,658	172,495	145,981
INCOME FROM OPERATIONS	2,987	8,547	22,274	29,493
OTHER INCOME (EXPENSE):
Interest income	29	78	55	210
Interest expense	(3,022)	(1,489)	(6,120)	(4,776)
Other income (expense) — net	1	(476)	(445)	(281)
Other expense — net	(2,992)	(1,887)	(6,510)	(4,847)
INCOME (LOSS) BEFORE INCOME TAXES	(5)	6,660	15,764	24,646
INCOME TAX EXPENSE (BENEFIT)	(978)	1,842	3,149	7,253
NET INCOME	$ 973	$ 4,818	$ 12,615	$ 17,393
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.02	$ 0.11	$ 0.28	$ 0.40
Diluted (in dollars per share)	$ 0.02	$ 0.11	$ 0.28	$ 0.39
AVERAGE COMMON SHARES:
Basic (in shares)	44,447	44,165	44,346	43,976
Diluted (in shares)	45,000	44,734	44,763	44,467