Significant Accounting Policies (Intangible Assets) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) reporting_unit	Dec. 31, 2017 USD ($) reporting_unit
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets		$ 18,000
Gross Carrying Amount	$ 974,074	885,927
Accumulated Amortization	$ 806,887	$ 743,975
Weighted-Average Life (Years)	6 years 1 month 21 days	6 years 2 months 12 days
Finite-Lived Intangible Assets, Net	$ 167,187	$ 1,600
Number of goodwill reporting units | reporting_unit	1	2
Product related intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 746,152	$ 663,004
Accumulated Amortization	$ 601,993	$ 554,934
Weighted-Average Life (Years)	6 years 22 days	6 years 1 month 6 days
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 227,922	$ 222,923
Accumulated Amortization	$ 204,894	$ 189,041
Weighted-Average Life (Years)	6 years 4 months 24 days	6 years 5 months 27 days
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Life (Years)	10 years
Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Life (Years)	3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Life (Years)	7 years
Cost of net revenues | Product related intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 47,100	$ 65,700
Operating expenses | Other
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 15,900	17,200
Impairment of Product-related Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets		15,500
Impairment of Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets		$ 2,500