Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
REVENUES:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 312,282	$ 360,460	$ 643,214	$ 732,493
Cost of goods sold	208,413	208,660	404,042	431,692
Gross Profit	103,869	151,800	239,172	300,801
OPERATING EXPENSES:
Selling, general and administrative	67,824	81,816	140,457	166,831
Research and development	11,199	13,575	24,022	26,161
Restructuring, strategic transaction and integration	37,041	18,690	61,433	40,259
Change in fair value of contingent earn-out	(39,500)	6,000	(47,200)	2,000
contract settlement	1,039	0	3,822	28,917
TOTAL OPERATING EXPENSES	77,603	120,081	182,534	264,168
INCOME (LOSS) FROM OPERATIONS	26,266	31,719	56,638	36,633
Interest Expense	(139)	(130)	(272)	(265)
OTHER INCOME (EXPENSE), net	1,479	(1,992)	4,670	(2,948)
INCOME BEFORE INCOME TAXES	27,606	29,597	61,036	33,420
(PROVISION) BENEFIT FOR INCOME TAXES	(4,773)	1,457	(7,205)	2,509
NET INCOME	$ 22,833	$ 31,054	$ 53,831	$ 35,929
NET INCOME (LOSS) PER SHARE
Basic (in dollars per share)	$ 1.11	$ 1.53	$ 2.62	$ 1.77
Diluted (in dollars per share)	$ 1.06	$ 1.44	$ 2.50	$ 1.67
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	20,622	20,352	20,577	20,304
Diluted (in shares)	21,520	21,569	21,546	21,536