Goodwill And Other Intangible Assets (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Intangible Assets [Abstract]
Gross carrying amount	$ 914,833		$ 914,833		$ 871,286
Accumulated amortization	746,740		746,740		697,605
Intangible assets, fair value	168,093		168,093
Product Related Intangible Assets [Member]
Intangible Assets [Abstract]
Gross carrying amount	686,901		686,901		647,594
Accumulated amortization	558,809		558,809		520,746
Other [Member]
Intangible Assets [Abstract]
Gross carrying amount	227,932		227,932		223,692
Accumulated amortization	187,931		$ 187,931		$ 176,859
Minimum [Member]
Statement [Line Items]
Intangible asset life			3 years
Maximum [Member]
Statement [Line Items]
Intangible asset life			7 years
Maximum [Member] | Patents [Member]
Statement [Line Items]
Intangible asset life			10 years
Cost of net revenues [Member] | Product Related Intangible Assets [Member]
Intangible Assets [Abstract]
Amortization expense	17,600	$ 14,800	$ 43,100	$ 43,200
Operating Expense [Member] | Other [Member]
Intangible Assets [Abstract]
Amortization expense	$ 3,700	$ 3,900	$ 11,100	$ 11,400