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Intangible Assets (Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Accumulated Amortization | $ (144,806) | $ (134,350)
Intangible assets, Gross | $ 267,400 | 255,851
Weighted average useful life remaining (in years) | 4 years |
Patent Costs [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 16,969 | 16,263
Intangible assets with finite lives: Accumulated Amortization | (6,337) | (5,873)
Intangible assets with finite lives: Net | $ 10,632 | 10,390
Weighted average useful life remaining (in years) | 9 years |
Acquired Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 54,192 | 52,881
Intangible assets with finite lives: Accumulated Amortization | (31,125) | (27,543)
Intangible assets with finite lives: Net | $ 23,067 | 25,338
Weighted average useful life remaining (in years) | 4 years |
Acquired Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 16,982 | 17,047
Intangible assets with finite lives: Accumulated Amortization | (11,093) | (9,454)
Intangible assets with finite lives: Net | $ 5,889 | 7,593
Weighted average useful life remaining (in years) | 4 years |
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 103,106 | 99,067
Intangible assets with finite lives: Accumulated Amortization | (49,576) | (46,252)
Intangible assets with finite lives: Net | $ 53,530 | 52,815
Weighted average useful life remaining (in years) | 6 years |
Trade Secrets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 19,254 | 19,530
Intangible assets with finite lives: Accumulated Amortization | (9,926) | (7,919)
Intangible assets with finite lives: Net | $ 9,328 | 11,611
Weighted average useful life remaining (in years) | 4 years |
Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 32,926 | 28,110
Intangible assets with finite lives: Accumulated Amortization | (16,936) | (16,015)
Intangible assets with finite lives: Net | $ 15,990 | 12,095
Weighted average useful life remaining (in years) | 5 years |
Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets with finite lives: Gross | $ 23,971 | 22,953
Intangible assets with finite lives: Accumulated Amortization | (19,813) | (21,294)
Intangible assets with finite lives: Net | $ 4,158 | $ 1,659
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] | Patent 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] | Acquired Patents [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] | Trade Secrets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 7 years |
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 | 2 years |
Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 20 years |
Maximum [Member] | Patent 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] | Acquired Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 6 years |
Maximum [Member] | Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets estimated useful lives | 14 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 | 4 years |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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