Accounting Policies (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 42.7	$ 55.0	$ 55.3	$ 49.6
Policy for allowance for slow-moving inventory	24 months
Research and development expense	14.3us-gaap_ResearchAndDevelopmentExpense	14.7us-gaap_ResearchAndDevelopmentExpense	15.1us-gaap_ResearchAndDevelopmentExpense
Outside of North America [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 31.3	$ 35.5

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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