Condensed Consolidated Statements of Comprehensive (Loss) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues, net	$ 178,057,000	$ 190,944,000	$ 343,928,000	$ 375,007,000
Cost of sales (exclusive of amortization of intangibles, included within operating expenses below)	110,073,000	109,665,000	222,431,000	211,500,000
GROSS PROFIT	67,984,000	81,279,000	121,497,000	163,507,000
Selling, general and administrative expenses	61,042,000	83,758,000	133,540,000	146,752,000
Research and development expenses	9,495,000	11,371,000	18,209,000	24,015,000
Amortization of intangibles	9,950,000	13,182,000	21,015,000	26,372,000
Impairment of goodwill	0	0	15,955,000	0
Impairment of intangible assets	394,000	64,534,000	10,748,000	83,349,000
Litigation rulings, settlements and contingencies	74,469,000	(400,000)	74,879,000	(400,000)
TOTAL OPERATING EXPENSES	155,350,000	172,445,000	274,346,000	280,088,000
OPERATING (LOSS)	(87,366,000)	(91,166,000)	(152,849,000)	(116,581,000)
Amortization of deferred financing costs	(5,655,000)	(1,304,000)	(6,959,000)	(2,608,000)
Interest expense, net	(17,341,000)	(11,062,000)	(31,668,000)	(20,640,000)
Other non-operating income (loss), net	245,000	(724,000)	598,000	(454,000)
(LOSS) BEFORE INCOME TAXES	(110,117,000)	(104,256,000)	(190,878,000)	(140,283,000)
Income tax provision (benefit)	1,482,000	(16,272,000)	2,902,000	(23,552,000)
NET (LOSS)	$ (111,599,000)	$ (87,984,000)	$ (193,780,000)	$ (116,731,000)
NET (LOSS) PER SHARE
NET (LOSS) PER SHARE, BASIC (in Dollars per share)	$ (0.89)	$ (0.70)	$ (1.54)	$ (0.93)
NET (LOSS) PER SHARE, DILUTED (in Dollars per share)	$ (0.89)	$ (0.70)	$ (1.54)	$ (0.93)
SHARES USED IN COMPUTING NET (LOSS) PER SHARE
BASIC (in Shares)	126,043	125,332	125,806	125,286
DILUTED (in Shares)	126,043	125,332	125,806	125,286
COMPREHENSIVE (LOSS)
Net (loss)	$ (111,599,000)	$ (87,984,000)	$ (193,780,000)	$ (116,731,000)
Unrealized holding (loss) on available-for-sale securities, net of tax of $1 and $1 for the three month periods ended June 30, 2019 and 2018, and $1 and $1 for the six month periods ended June 30, 2019 and 2018, respectively.	(3,000)	(4,000)	(3,000)	(5,000)
Foreign currency translation gain (loss)	1,380,000	(6,350,000)	956,000	(7,198,000)
Pension liability adjustment (loss) gain, net of tax of ($48) and ($1) for the three month periods ended June 30, 2019 and 2018, and ($19) and ($2) for the six month periods ended June 30, 2019 and 2018, respectively.	190,000	4,000	74,000	8,000
COMPREHENSIVE (LOSS)	$ (110,032,000)	$ (94,334,000)	$ (192,753,000)	$ (123,926,000)