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Intangible Assets (Intangible Assets Other Than Goodwill) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Accumulated Amortization $ (69,554) $ (58,562)
Intangible assets, Gross 211,263 166,939
Intangible assets, Net 141,709 108,377
Trademarks [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets 2,110 2,770
Licenses [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 5,875 5,875
Intangible assets with finite lives: Accumulated Amortization (5,875) (5,875)
Patent Costs [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 21,545 27,635
Intangible assets with finite lives: Accumulated Amortization (5,960) (14,047)
Intangible assets with finite lives: Net 15,585 13,588
Acquired Technology [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 30,095 26,262
Intangible assets with finite lives: Accumulated Amortization (13,615) (11,852)
Intangible assets with finite lives: Net 16,480 14,410
Internally Developed Software [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 18,097 17,847
Intangible assets with finite lives: Accumulated Amortization (12,863) (11,424)
Intangible assets with finite lives: Net 5,234 6,423
Intangible assets, useful life 5 years  
Customer Relationships [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 95,793 60,329
Intangible assets with finite lives: Accumulated Amortization (18,283) (7,754)
Intangible assets with finite lives: Net 77,510 52,575
Non-Compete Agreements [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 16,848 14,051
Intangible assets with finite lives: Accumulated Amortization (6,666) (3,836)
Intangible assets with finite lives: Net 10,182 10,215
Trade Names [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 9,302 5,814
Intangible assets with finite lives: Accumulated Amortization (2,211) (723)
Intangible assets with finite lives: Net 7,091 5,091
Other [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 11,598 6,356
Intangible assets with finite lives: Accumulated Amortization (4,081) (3,051)
Intangible assets with finite lives: Net $ 7,517 $ 3,305
Minimum [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 1 year  
Minimum [Member] | Patent Costs [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 6 years  
Minimum [Member] | Acquired Technology [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 5 years  
Minimum [Member] | Customer Relationships [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 5 years  
Minimum [Member] | Non-Compete Agreements [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 3 years  
Minimum [Member] | Trade Names [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 2 years  
Minimum [Member] | Other [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 1 year  
Maximum [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 20 years  
Maximum [Member] | Patent Costs [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 19 years  
Maximum [Member] | Acquired Technology [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 10 years  
Maximum [Member] | Customer Relationships [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 20 years  
Maximum [Member] | Non-Compete Agreements [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 11 years  
Maximum [Member] | Trade Names [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 10 years  
Maximum [Member] | Other [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 7 years  
Weighted Average [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 4 years  
Weighted Average [Member] | Patent Costs [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 3 years  
Weighted Average [Member] | Acquired Technology [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 5 years  
Weighted Average [Member] | Internally Developed Software [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 1 year  
Weighted Average [Member] | Customer Relationships [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 5 years  
Weighted Average [Member] | Non-Compete Agreements [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 3 years  
Weighted Average [Member] | Trade Names [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 3 years  
Weighted Average [Member] | Other [Member]
    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets, useful life 2 years