Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUES:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 307,471	$ 327,169	$ 950,685	$ 1,059,662
Cost of goods sold	188,919	192,582	592,961	624,274
Gross Profit	118,552	134,587	357,724	435,388
OPERATING EXPENSES:
Selling, general and administrative	65,876	76,640	206,333	243,471
Research and development	12,002	13,181	36,024	39,342
Restructuring, strategic transaction and integration	7,975	24,012	69,408	64,271
Change in fair value of contingent earn-out	(200)	18,500	(47,400)	20,500
contract settlement	0	0	3,822	28,917
TOTAL OPERATING EXPENSES	85,653	132,333	268,187	396,501
INCOME (LOSS) FROM OPERATIONS	32,899	2,254	89,537	38,887
Interest Expense	(139)	(283)	(411)	(548)
OTHER INCOME (EXPENSE), net	(10)	(534)	4,660	(3,482)
INCOME BEFORE INCOME TAXES	32,750	1,437	93,786	34,857
(PROVISION) BENEFIT FOR INCOME TAXES	(6,187)	(1,218)	(13,392)	1,291
NET INCOME	$ 26,563	$ 219	$ 80,394	$ 36,148
NET INCOME (LOSS) PER SHARE
Basic (in dollars per share)	$ 1.29	$ 0.01	$ 3.90	$ 1.78
Diluted (in dollars per share)	$ 1.24	$ 0.01	$ 3.73	$ 1.67
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	20,666	20,474	20,607	20,362
Diluted (in shares)	21,487	21,633	21,556	21,588