Intangible Assets, Net (Schedule Of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 209,942	$ 202,730
Accumulated Amortization	(133,454)	(124,448)
Net Carrying Amount	76,488	78,282
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	68,892	58,343
Accumulated Amortization	(30,710)	(22,853)
Net Carrying Amount	38,182	35,490
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	85,528	88,216
Accumulated Amortization	(65,398)	(65,663)
Net Carrying Amount	20,130	22,553
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,373	27,791
Accumulated Amortization	(13,812)	(12,859)
Net Carrying Amount	14,561	14,932
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,149	28,380
Accumulated Amortization	(23,534)	(23,073)
Net Carrying Amount	$ 3,615	$ 5,307