Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenues, net	$ 284,095	$ 256,801	$ 833,176	$ 705,099
Cost of sales (exclusive of amortization of intangibles, included within operating expenses below)	113,868	93,789	328,159	283,517
GROSS PROFIT	170,227	163,012	505,017	421,582
Selling, general and administrative expenses	47,074	45,031	150,131	110,225
Acquisition-related costs	23	230	356	1,712
Research and development expenses	10,618	10,439	28,965	30,303
Amortization of intangible assets	16,474	16,545	49,422	49,206
Impairment of intangible assets	9,210	0	9,368	0
TOTAL OPERATING EXPENSES	83,399	72,245	238,242	191,446
OPERATING INCOME	86,828	90,767	266,775	230,136
Amortization of deferred financing costs	(1,304)	(1,086)	(9,487)	(3,108)
Interest expense, net	(10,344)	(12,652)	(32,630)	(39,367)
Bargain purchase gain	0	0	0	849
Other non-operating income (expense), net	34	(3,014)	(2,597)	(5,809)
INCOME BEFORE INCOME TAXES	75,214	74,015	222,061	182,701
Income tax provision	27,305	26,048	70,273	64,688
CONSOLIDATED NET INCOME	$ 47,909	$ 47,967	$ 151,788	$ 118,013
CONSOLIDATED NET INCOME PER SHARE
CONSOLIDATED NET INCOME, BASIC (in Dollars per share)	$ 0.38	$ 0.40	$ 1.24	$ 1.02
CONSOLIDATED NET INCOME, DILUTED (in Dollars per share)	$ 0.38	$ 0.39	$ 1.21	$ 0.96
SHARES USED IN COMPUTING NET INCOME PER SHARE
BASIC (in Shares)	125,855	119,260	122,232	116,162
DILUTED (in Shares)	126,334	125,891	126,065	125,738
COMPREHENSIVE INCOME
Consolidated net income	$ 47,909	$ 47,967	$ 151,788	$ 118,013
Unrealized holding gain (loss) on available-for-sale securities, net of tax of $125 and $163 for the three month periods ended September 30, 2016 and 2015, and ($450) and ($51) for the nine month periods ended September 30, 2016 and 2015, respectively.	(212)	(277)	763	(87)
Foreign currency translation gain (loss), net of tax of ($591) and $1,714 for the three month periods ended September 30, 2016 and 2015 and ($194) and $731 for the nine month periods ended September 30, 2016 and 2015, respectively.	1,276	(3,332)	837	(1,419)
Pension liability adjustment gain (loss), net of tax of $0 for the three month period ended September 30, 2016 and $694 for the nine month period ended September 30, 2016, respectively.	161	0	(2,566)	0
COMPREHENSIVE INCOME	$ 49,134	$ 44,358	$ 150,822	$ 116,507