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Intangible Assets (Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Accumulated Amortization | $ (114,316) | $ (104,963)
Intangible assets, Gross | 265,682 | 262,429
Intangible assets, Net | $ 151,366 | 157,466
Weighted average useful life remaining (in years) | 5 years |
Patents Costs [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 16,547 | 16,251
Intangible assets with finite lives: Accumulated Amortization | (5,248) | (4,895)
Intangible assets with finite lives: Net | $ 11,299 | 11,356
Weighted average useful life remaining (in years) | 8 years |
Acquired Technology [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 53,735 | 52,809
Intangible assets with finite lives: Accumulated Amortization | (19,497) | (16,405)
Intangible assets with finite lives: Net | $ 34,238 | 36,404
Weighted average useful life remaining (in years) | 4 years |
Internally Developed Software [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 4,730 | 4,730
Intangible assets with finite lives: Accumulated Amortization | (3,069) | (2,919)
Intangible assets with finite lives: Net | $ 1,661 | 1,811
Intangible assets estimated useful lives | 3 years |
Weighted average useful life remaining (in years) | 3 years |
Customer Relationships [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 103,825 | 101,933
Intangible assets with finite lives: Accumulated Amortization | (39,768) | (36,158)
Intangible assets with finite lives: Net | $ 64,057 | 65,775
Weighted average useful life remaining (in years) | 7 years |
Non-Compete Agreements [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 12,043 | 12,163
Intangible assets with finite lives: Accumulated Amortization | (8,722) | (8,558)
Intangible assets with finite lives: Net | $ 3,321 | 3,605
Weighted average useful life remaining (in years) | 3 years |
Trade Names [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 28,347 | 28,108
Intangible assets with finite lives: Accumulated Amortization | (13,456) | (12,498)
Intangible assets with finite lives: Net | $ 14,891 | 15,610
Weighted average useful life remaining (in years) | 6 years |
Other [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 46,455 | 46,435
Intangible assets with finite lives: Accumulated Amortization | (24,556) | (23,530)
Intangible assets with finite lives: Net | $ 21,899 | $ 22,905
Weighted average useful life remaining (in years) | 5 years |
Minimum [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 1 year |
Minimum [Member] | Patents Costs [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 1 year |
Minimum [Member] | Acquired Technology [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 2 years |
Minimum [Member] | Customer Relationships [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 2 years |
Minimum [Member] | Non-Compete Agreements [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 2 years |
Minimum [Member] | Trade Names [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 1 year |
Minimum [Member] | Other [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 1 year |
Maximum [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 19 years |
Maximum [Member] | Patents Costs [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 19 years |
Maximum [Member] | Acquired Technology [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 15 years |
Maximum [Member] | Customer Relationships [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 15 years |
Maximum [Member] | Non-Compete Agreements [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 5 years |
Maximum [Member] | Trade Names [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 9 years |
Maximum [Member] | Other [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 7 years |

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