Intangibles (Schedule Of Finite-Lived Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 178,040	$ 167,493
Accumulated Amortization	(97,361)	(83,627)
Net Carrying Amount	80,679	83,866
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	63,150	53,086
Accumulated Amortization	(36,723)	(29,606)
Net Carrying Amount	26,427	23,480
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	67,868	67,918
Accumulated Amortization	(36,991)	(32,210)
Net Carrying Amount	30,877	35,708
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23,199	21,875
Accumulated Amortization	(8,691)	(7,992)
Net Carrying Amount	14,508	13,883
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23,823	24,614
Accumulated Amortization	(14,956)	(13,819)
Net Carrying Amount	$ 8,867	$ 10,795