Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014 segment	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Number of reportable segments	3us-gaap_NumberOfReportableSegments
Advertising costs	$ 14.5us-gaap_AdvertisingExpense	$ 14.6us-gaap_AdvertisingExpense	$ 15.3us-gaap_AdvertisingExpense
Highly liquid debt instruments, maturity period	90 days or less
Impairment of long-lived assets	2.5	2.7	7.0
(Increase) decrease in income attributable to common shareholders	1.3	1.2	0.1
Option to purchase common stock shares not included in the computation of diluted EPS	500,000	0	1,200,000
Research and development expense	36.8us-gaap_ResearchAndDevelopmentExpense	33.0us-gaap_ResearchAndDevelopmentExpense	36.4us-gaap_ResearchAndDevelopmentExpense
Foreign currency transaction loss	$ 0.9	$ 2.2	$ 2.3
Percentage of concentration risk	2.00%us-gaap_ConcentrationRiskPercentage1

Increase decrease in income attributable to common shareholders.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 720

-SubTopic 35

-Section 50

-Paragraph 1

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

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-Name Accounting Standards Codification

-Glossary Antidilution

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-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

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-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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-Topic 825

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Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.22(a)(2))

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- Definition

Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.

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-Name Accounting Standards Codification

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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-Glossary Impairment

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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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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