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Intangible Assets (Intangible Assets Other Than Goodwill) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross $ 255,851 $ 262,429
Intangible assets with finite lives: Accumulated Amortization (134,350) (104,963)
Intangible assets with finite lives: Net $ 121,501 157,466
Weighted average useful life remaining (in years) 4 years  
Patents Costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross $ 16,263 16,251
Intangible assets with finite lives: Accumulated Amortization (5,873) (4,895)
Intangible assets with finite lives: Net $ 10,390 11,356
Weighted average useful life remaining (in years) 9 years  
Acquired Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross $ 52,881 52,809
Intangible assets with finite lives: Accumulated Amortization (27,543) (16,405)
Intangible assets with finite lives: Net $ 25,338 36,404
Weighted average useful life remaining (in years) 4 years  
Internally Developed Software [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross $ 4,730 4,730
Intangible assets with finite lives: Accumulated Amortization (3,522) (2,919)
Intangible assets with finite lives: Net 1,208 1,811
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross 99,067 101,933
Intangible assets with finite lives: Accumulated Amortization (46,252) (36,158)
Intangible assets with finite lives: Net $ 52,815 65,775
Weighted average useful life remaining (in years) 6 years  
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross $ 9,423 12,163
Intangible assets with finite lives: Accumulated Amortization (7,277) (8,558)
Intangible assets with finite lives: Net $ 2,146 3,605
Weighted average useful life remaining (in years) 2 years  
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross $ 28,110 28,108
Intangible assets with finite lives: Accumulated Amortization (16,015) (12,498)
Intangible assets with finite lives: Net $ 12,095 15,610
Weighted average useful life remaining (in years) 5 years  
Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets with finite lives: Gross $ 45,377 46,435
Intangible assets with finite lives: Accumulated Amortization (27,868) (23,530)
Intangible assets with finite lives: Net $ 17,509 $ 22,905
Weighted average useful life remaining (in years) 4 years  
Minimum [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 1 year  
Minimum [Member] | Patents Costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 1 year  
Minimum [Member] | Acquired Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 1 year  
Minimum [Member] | Internally Developed Software [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 2 years  
Minimum [Member] | Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 1 year  
Minimum [Member] | Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 1 year  
Minimum [Member] | Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 1 year  
Minimum [Member] | Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 1 year  
Maximum [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 20 years  
Maximum [Member] | Patents Costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 20 years  
Maximum [Member] | Acquired Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 16 years  
Maximum [Member] | Internally Developed Software [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average useful life remaining (in years) 2 years  
Maximum [Member] | Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 14 years  
Maximum [Member] | Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 4 years  
Maximum [Member] | Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 8 years  
Maximum [Member] | Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets estimated useful lives 6 years