CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
NET SALES	$ 243,525	$ 238,349
COST OF SALES	139,741	133,713
GROSS PROFIT	103,784	104,636
OPERATING EXPENSES:
Selling, general and administrative	78,808	78,270
Research and development	14,872	16,043
Impairment and other charges	3,845	0
Contingent consideration expense	4,897	775
Acquired in-process research and development		25
Total operating expenses	102,422	95,113
INCOME FROM OPERATIONS	1,362	9,523
OTHER INCOME (EXPENSE):
Interest income	79	357
Interest expense	(3,144)	(2,764)
Other expense - net	(289)	(270)
Total other expense - net	(3,354)	(2,677)
INCOME (LOSS) BEFORE INCOME TAXES	(1,992)	6,846
INCOME TAX EXPENSE	1,162	651
NET INCOME (LOSS)	$ (3,154)	$ 6,195
EARNINGS (LOSS) PER COMMON SHARE:
Basic (in dollars per share)	$ (0.06)	$ 0.11
Diluted (in dollars per share)	$ (0.06)	$ 0.11
AVERAGE COMMON SHARES:
Basic (in shares)	55,246	54,917
Diluted (in shares)	55,246	56,490