Condensed Consolidated Statements of Comprehensive (Loss) 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
Income Statement [Abstract]
Revenues, net	$ 165,625	$ 202,428	$ 540,632	$ 654,988
Cost of sales (exclusive of amortization of intangibles, included within operating expenses below)	108,363	104,665	319,863	305,687
GROSS PROFIT	57,262	97,763	220,769	349,301
Selling, general and administrative expenses	63,173	53,404	209,850	154,968
Acquisition-related costs	24	34	99	121
Research and development expenses	35,389	12,250	140,627	39,417
Amortization of intangibles	13,613	15,316	39,985	46,291
Impairment of intangible assets	6,699	7,599	8,825	10,657
Litigation rulings and settlements	14,344	400	13,944	(870)
TOTAL OPERATING EXPENSES	133,242	89,003	413,330	250,584
OPERATING (LOSS) INCOME	(75,980)	8,760	(192,561)	98,717
Amortization of deferred financing costs	(1,304)	(1,304)	(3,912)	(3,912)
Interest expense, net	(11,691)	(9,592)	(32,331)	(28,538)
Other non-operating (expense) income, net	436	199	(18)	3,872
(LOSS) INCOME BEFORE INCOME TAXES	(88,539)	(1,937)	(228,822)	70,139
Income tax (benefit) provision	(18,399)	960	(41,951)	29,472
CONSOLIDATED NET (LOSS) INCOME	$ (70,140)	$ (2,897)	$ (186,871)	$ 40,667
CONSOLIDATED NET (LOSS) INCOME PER SHARE
CONSOLIDATED NET (LOSS) INCOME PER SHARE, BASIC (in Dollars per share)	$ (0.56)	$ (0.02)	$ (1.49)	$ 0.33
CONSOLIDATED NET (LOSS) INCOME PER SHARE, DILUTED (in Dollars per share)	$ (0.56)	$ (0.02)	$ (1.49)	$ 0.33
SHARES USED IN COMPUTING NET (LOSS) INCOME PER SHARE
BASIC (in Shares)	125,462	124,986	125,346	124,691
DILUTED (in Shares)	125,462	124,986	125,346	125,046
COMPREHENSIVE (LOSS) INCOME
Consolidated net (loss) income	$ (70,140)	$ (2,897)	$ (186,871)	$ 40,667
Unrealized holding (loss) gain on available-for-sale securities, net of tax of $2 and $3 for the three month periods ended September 30, 2018 and 2017, and $3 and ($158) for the nine month periods ended September 30, 2018 and 2017 respectively.	(4)	(5)	(9)	267
Foreign currency translation (loss) gain	(4,669)	(1,137)	(11,867)	4,128
Pension liability adjustment gain, net of tax of ($1) and ($6) for the three months ended September 30, 2018 and 2017, and ($3) and ($69) for the nine month periods ended September 30, 2018 and 2017 respectively.	4	24	12	271
COMPREHENSIVE (LOSS) INCOME	$ (74,809)	$ (4,015)	$ (198,735)	$ 45,333