Business Acquisition Acquired Intangible Assets (Details) (Pronamic And SNN [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
	Dec. 31, 2014
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