Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative, notional amount	$ 479,900,000invest_DerivativeNotionalAmount	$ 321,400,000invest_DerivativeNotionalAmount
Forward Contracts
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative, notional amount	479,900,000	321,400,000
Forward Contracts \| Other Accounts Receivable
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value of foreign currency forward contracts, assets	600,000	200,000
Forward Contracts \| Other income (expenses), net
Fair Value, Option, Quantitative Disclosures [Line Items]
Recognized gains (losses) of foreign currency forward contracts	(17,800,000)	(1,100,000)	5,100,000
Forward Contracts \| Other, net
Fair Value, Option, Quantitative Disclosures [Line Items]
Change in the fair value of foreign currency forward contracts	17,800,000	1,100,000	(5,100,000)
Cash settlements	$ (18,300,000)	$ (1,800,000)	$ 4,800,000

The change in the fair value of foreign currency forward contracts that are not designated as hedging instruments.

No definition available.

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- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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- Definition

The amount of cash received during the period on settlement of a hedge.

+ References

No definition available.

+ Details

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- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

+ Details

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- Details

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- Definition

Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

+ Details

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- Details

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