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Intangible Assets (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]      
Costs incurred to acquire intangible assets $ 1,648 $ 729 $ 336
Increase (decrease) in finite lived intangible assets accumulated amortization (1,763)    
Other intangible asset, net 141,709 108,377  
Annual estimated amortization expense, in 2014 22,120    
Annual estimated amortization expense, in 2015 20,302    
Annual estimated amortization expense, in 2016 18,119    
Annual estimated amortization expense, in 2017 16,109    
Annual estimated amortization expense, in 2018 13,616    
Patent Costs [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Costs incurred to acquire, develop and extend patents 1,648 729 336
Intangible assets with finite lives: Gross 21,545 27,635  
Amortization expense for intangible assets 250 215 237
Acquired Technology [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Increase (decrease) in finite intangible assets 3,833    
Intangible assets with finite lives: Gross 30,095 26,262  
Internally Developed Software, Non-Compete Agreements, Customer Relationships, Trade Names And Other [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Other intangible asset, net 109,644 80,276  
Finite intangible assets acquired 51,930 65,957  
Amortization expense for intangible assets $ 20,447 $ 12,573 $ 4,588
Minimum [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, useful life 1 year    
Minimum [Member] | Patent Costs [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, useful life 6 years    
Minimum [Member] | Acquired Technology [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, useful life 5 years    
Minimum [Member] | Internally Developed Software, Non-Compete Agreements, Customer Relationships, Trade Names And Other [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, useful life 1 year    
Maximum [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, useful life 20 years    
Maximum [Member] | Patent Costs [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, useful life 19 years    
Maximum [Member] | Acquired Technology [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, useful life 10 years    
Maximum [Member] | Internally Developed Software, Non-Compete Agreements, Customer Relationships, Trade Names And Other [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, useful life 20 years