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Business Acquisition Acquired Intangible Assets (Details) - Dec. 31, 2014 - Pronamic And SNN [Member] - USD ($) $ in Millions | Total
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Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 11.6
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 15 years
Customer relationships [Member] |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 6.1
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 15 years
Developed Technology [Member] |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 2.1
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 20 years
Patents [Member] |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 1.5
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 17 years
Customer Contracts [Member] |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | $ 1.9
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 6 years

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- Definition [Line Items] for Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table] + References No definition available. + Details
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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=26713463&loc=d3e16265-109275 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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