Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues, net	$ 199,140	$ 280,734	$ 452,560	$ 549,081
Cost of sales (exclusive of amortization of intangibles, included within operating expenses below)	96,173	108,961	200,461	214,291
GROSS PROFIT	102,967	171,773	252,099	334,790
Selling, general and administrative expenses	53,923	53,971	101,449	103,057
Acquisition-related costs	76	136	87	333
Research and development expenses	15,876	8,868	27,167	18,347
Amortization of intangibles	15,504	16,430	30,975	32,948
Impairment of intangible assets	3,058	0	3,058	158
TOTAL OPERATING EXPENSES	88,437	79,405	162,736	154,843
OPERATING INCOME	14,530	92,368	89,363	179,947
Amortization of deferred financing costs	(1,304)	(1,872)	(2,608)	(8,183)
Interest expense, net	(9,380)	(10,768)	(18,946)	(22,286)
Other non-operating income (expense), net	2,904	547	4,267	(2,631)
INCOME BEFORE INCOME TAXES	6,750	80,275	72,076	146,847
Income tax provision	4,213	18,282	28,512	42,968
CONSOLIDATED NET INCOME	$ 2,537	$ 61,993	$ 43,564	$ 103,879
CONSOLIDATED NET INCOME PER SHARE
CONSOLIDATED NET INCOME, BASIC (in Dollars per share)	$ 0.02	$ 0.51	$ 0.35	$ 0.86
CONSOLIDATED NET INCOME, DILUTED (in Dollars per share)	$ 0.02	$ 0.50	$ 0.35	$ 0.83
SHARES USED IN COMPUTING NET INCOME PER SHARE
BASIC (in Shares)	124,660	121,374	124,541	120,401
DILUTED (in Shares)	125,194	125,924	124,855	125,934
COMPREHENSIVE INCOME
Consolidated net income	$ 2,537	$ 61,993	$ 43,564	$ 103,879
Unrealized holding gain on available-for-sale securities, net of tax of ($85) and ($961) for the three months ended June 30, 2017 and 2016. ($160) and ($575) for the six month periods ended June 30, 2017 and 2016 respectively.	144	1,629	272	975
Foreign currency translation gain (loss)	1,239	(1,308)	5,265	(439)
Pension liability adjustment gain (loss), net of tax of ($6) and $694 for the three months ended June 30, 2017 and 2016, and ($63) and $694 for the six month periods ended June 30, 2017 and 2016 respectively.	24	(2,727)	247	(2,727)
COMPREHENSIVE INCOME	$ 3,944	$ 59,587	$ 49,348	$ 101,688