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Business Combination Schedule of Intangible Assets Acquired (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired $ 8,300
SignalDemand [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 8,300
Cameleon Acquisition [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 18,653
Developed Technology Rights [Member] | SignalDemand [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 4,600
Finite-Lived Intangible Asset, Useful Life 7 years
Developed Technology Rights [Member] | Cameleon Acquisition [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 11,147
Finite-Lived Intangible Asset, Useful Life 7 years
Software and Software Development Costs [Member] | SignalDemand [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 160
Finite-Lived Intangible Asset, Useful Life 2 years
Customer Relationships [Member] | SignalDemand [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 3,500
Finite-Lived Intangible Asset, Useful Life 8 years
Customer Relationships [Member] | Cameleon Acquisition [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 1,455
Maintenance relationship [Member] | Cameleon Acquisition [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 3,808
Finite-Lived Intangible Asset, Useful Life 8 years
Trade Names [Member] | SignalDemand [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 40
Finite-Lived Intangible Asset, Useful Life 2 years
Trade Names [Member] | Cameleon Acquisition [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired 1,020
Finite-Lived Intangible Asset, Useful Life 8 years
Other Intangible Assets [Member] | Cameleon Acquisition [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-lived Intangible Assets Acquired $ 1,223
Finite-Lived Intangible Asset, Useful Life 2 years
Minimum [Member] | Customer Relationships [Member] | Cameleon Acquisition [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-Lived Intangible Asset, Useful Life 2 years
Maximum [Member] | Customer Relationships [Member] | Cameleon Acquisition [Member]
  
Acquired Finite-Lived Intangible Assets [Line Items]  
Finite-Lived Intangible Asset, Useful Life 5 years