Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
REVENUES:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 330,932	$ 372,033
Cost of goods sold	195,629	223,032
Gross Profit	135,303	149,001
OPERATING EXPENSES:
Selling, general and administrative	72,633	85,015
Research and development	12,823	12,586
Restructuring, strategic transaction and integration	24,392	21,569
Change in fair value of contingent earn-out	(7,700)	(4,000)
Contract settlement	2,783	28,917
TOTAL OPERATING EXPENSES	104,931	144,087
INCOME (LOSS) FROM OPERATIONS	30,372	4,914
Interest Expense	(133)	(135)
OTHER INCOME (EXPENSE), net	3,191	(956)
INCOME BEFORE INCOME TAXES	33,430	3,823
(PROVISION) BENEFIT FOR INCOME TAXES	(2,432)	1,052
NET INCOME	$ 30,998	$ 4,875
NET INCOME (LOSS) PER SHARE
Basic (in dollars per share)	$ 1.51	$ 0.24
Diluted (in dollars per share)	$ 1.44	$ 0.23
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	20,527	20,255
Diluted (in shares)	21,551	21,400