Intangible Assets, Net (Schedule Of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 213,644	$ 202,730
Accumulated Amortization	(131,399)	(124,448)
Net Carrying Amount	82,245	78,282
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	70,529	58,343
Accumulated Amortization	(25,050)	(22,853)
Net Carrying Amount	45,479	35,490
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	85,545	88,216
Accumulated Amortization	(68,302)	(65,663)
Net Carrying Amount	17,243	22,553
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	29,794	27,791
Accumulated Amortization	(14,419)	(12,859)
Net Carrying Amount	15,375	14,932
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,776	28,380
Accumulated Amortization	(23,628)	(23,073)
Net Carrying Amount	$ 4,148	$ 5,307