CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
NET SALES	$ 171,069	$ 138,077
COST OF SALES	95,127	77,977
GROSS PROFIT	75,942	60,100
OPERATING EXPENSES:
Selling, general and administrative	57,771	41,704
Research and development	12,525	10,588
Contingent consideration expense	37	102
Total operating expenses	70,333	52,394
INCOME FROM OPERATIONS	5,609	7,706
OTHER INCOME (EXPENSE):
Interest income	83	9
Interest expense	(2,706)	(1,329)
Gain on bargain purchase	12,243	0
Other income (expense) — net	264	(480)
Other income (expense) — net	9,884	(1,800)
INCOME BEFORE INCOME TAXES	15,493	5,906
INCOME TAX EXPENSE	690	1,555
NET INCOME	$ 14,803	$ 4,351
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.33	$ 0.10
Diluted (in dollars per share)	$ 0.32	$ 0.10
AVERAGE COMMON SHARES:
Basic (in shares)	44,830	44,275
Diluted (in shares)	45,820	44,579