Fair Value Measurements - Additional Information (Detail) (FX Forward Contracts [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
FX Forward Contracts [Member]
Fair Values Of Financial Instruments [Line Items]
Fair value of foreign currency forward contracts	$ 0.1	$ 0.6

Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Balance Type:	debit
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