Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
REVENUES:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 327,169	$ 343,236	$ 1,059,662	$ 922,489
Cost of goods sold	192,582	231,638	624,274	633,884
Gross Profit	134,587	111,598	435,388	288,605
OPERATING EXPENSES:
Selling, general and administrative	78,068	76,820	248,603	226,812
Research and development	13,181	12,769	39,342	37,377
Restructuring, strategic transaction and integration	24,012	18,711	64,271	68,033
Change in fair value of contingent earn-out	18,500	7,000	20,500	13,000
Contract settlement	0	0	28,917	0
TOTAL OPERATING EXPENSES	133,761	115,300	401,633	345,222
INCOME (LOSS) FROM OPERATIONS	826	(3,702)	33,755	(56,617)
Bargain purchase gain	0	8,534	0	71,771
Interest Expense	(283)	(705)	(548)	(1,743)
OTHER INCOME (EXPENSE), net	894	583	1,650	(2,030)
INCOME BEFORE INCOME TAXES	1,437	4,710	34,857	11,381
(PROVISION) BENEFIT FOR INCOME TAXES	(1,218)	(4,574)	1,291	7,558
NET INCOME	$ 219	$ 136	$ 36,148	$ 18,939
NET INCOME (LOSS) PER SHARE
Basic (in dollars per share)	$ 0.01	$ 0.01	$ 1.78	$ 0.97
Diluted (in dollars per share)	$ 0.01	$ 0.01	$ 1.67	$ 0.92
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	20,474	19,984	20,362	19,433
Diluted (in shares)	21,633	21,106	21,588	20,603
Product [Member]
REVENUES:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 327,169	$ 343,084	$ 1,059,662	$ 921,544
Product and Service, Other [Member]
REVENUES:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 0	$ 152	$ 0	$ 945