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Intangible Assets (Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Accumulated Amortization | $ (161,870) | $ (134,350)
Intangible assets, Gross | $ 268,502 | 255,851
Weighted average useful life remaining (in years) | 4 years |
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 106,674 | 99,067
Intangible assets with finite lives: Accumulated Amortization | (56,538) | (46,252)
Intangible assets with finite lives: Net | $ 50,136 | 52,815
Weighted average useful life remaining (in years) | 6 years |
Acquired Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 55,148 | 52,881
Intangible assets with finite lives: Accumulated Amortization | (37,324) | (27,543)
Intangible assets with finite lives: Net | $ 17,824 | 25,338
Weighted average useful life remaining (in years) | 4 years |
Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 27,764 | 28,110
Intangible assets with finite lives: Accumulated Amortization | (16,322) | (16,015)
Intangible assets with finite lives: Net | $ 11,442 | 12,095
Weighted average useful life remaining (in years) | 5 years |
Patent Costs [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 17,135 | 16,263
Intangible assets with finite lives: Accumulated Amortization | (6,794) | (5,873)
Intangible assets with finite lives: Net | $ 10,341 | 10,390
Weighted average useful life remaining (in years) | 9 years |
Trade Secrets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 19,443 | 19,134
Intangible assets with finite lives: Accumulated Amortization | (11,016) | (9,383)
Intangible assets with finite lives: Net | $ 8,427 | 9,751
Intangible assets estimated useful lives | 7 years |
Weighted average useful life remaining (in years) | 4 years |
Acquired Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 16,655 | 16,965
Intangible assets with finite lives: Accumulated Amortization | (11,556) | (10,674)
Intangible assets with finite lives: Net | $ 5,099 | 6,291
Weighted average useful life remaining (in years) | 4 years |
Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 25,683 | 23,431
Intangible assets with finite lives: Accumulated Amortization | (22,320) | (18,610)
Intangible assets with finite lives: Net | $ 3,363 | $ 4,821
Weighted average useful life remaining (in years) | 2 years |
Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 1 year |
Minimum [Member] | Customer Relationships [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] | Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 1 year |
Minimum [Member] | Patent Costs [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 1 year |
Minimum [Member] | Acquired Patents [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 | 2 years |
Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 20 years |
Maximum [Member] | Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 14 years |
Maximum [Member] | Acquired Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 16 years |
Maximum [Member] | Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 8 years |
Maximum [Member] | Patent Costs [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 20 years |
Maximum [Member] | Acquired Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 6 years |
Maximum [Member] | Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 4 years |

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