Condensed Consolidated Statements of Comprehensive (Loss) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues, net	$ 165,871,000	$ 184,063,000
Cost of sales (exclusive of amortization of intangibles, included within operating expenses below)	112,358,000	101,835,000
GROSS PROFIT	53,513,000	82,228,000
Selling, general and administrative expenses	72,498,000	62,994,000
Research and development expenses	8,714,000	12,644,000
Amortization of intangibles	11,065,000	13,190,000
Impairment of goodwill	15,955,000	0
Impairment of intangible assets	10,354,000	18,815,000
Litigation rulings and settlements	410,000	0
TOTAL OPERATING EXPENSES	118,996,000	107,643,000
OPERATING (LOSS)	(65,483,000)	(25,415,000)
Amortization of deferred financing costs	(1,304,000)	(1,304,000)
Interest expense, net	(14,327,000)	(9,578,000)
Other non-operating income, net	353,000	270,000
(LOSS) BEFORE INCOME TAXES	(80,761,000)	(36,027,000)
Income tax provision (benefit)	1,420,000	(7,280,000)
NET (LOSS)	$ (82,181,000)	$ (28,747,000)
NET (LOSS) PER SHARE
NET (LOSS) PER SHARE, BASIC (in Dollars per share)	$ (0.65)	$ (0.23)
NET (LOSS) PER SHARE, DILUTED (in Dollars per share)	$ (0.65)	$ (0.23)
SHARES USED IN COMPUTING NET (LOSS) PER SHARE
BASIC (in Shares)	125,566	125,240
DILUTED (in Shares)	125,566	125,240
COMPREHENSIVE (LOSS)
Net (loss)	$ (82,181,000)	$ (28,747,000)
Unrealized holding (loss) on available-for-sale securities, net of tax of $0 for the three month period ended March 31, 2018.	0	(1,000)
Foreign currency translation (loss)	(424,000)	(848,000)
Pension liability adjustment (loss) gain, net of tax of $30 and ($1) for the three months ended March 31, 2019 and 2018, respectively.	(116,000)	4,000
COMPREHENSIVE (LOSS)	$ (82,721,000)	$ (29,592,000)