Other Income (Expense), Net (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Income and Expenses [Abstract]
Interest income, net	$ 29us-gaap_InvestmentIncomeNet	$ 44us-gaap_InvestmentIncomeNet	$ 52us-gaap_InvestmentIncomeNet
Foreign currency losses	(3,629)	(311)	(950)
Gains on foreign currency forward contracts	3,016	90	166
Other	(36)us-gaap_OtherNonoperatingExpense	(75)us-gaap_OtherNonoperatingExpense	(17)us-gaap_OtherNonoperatingExpense
Total other income (expense), net	$ (620)us-gaap_NonoperatingIncomeExpense	$ (252)us-gaap_NonoperatingIncomeExpense	$ (749)us-gaap_NonoperatingIncomeExpense

Amount before tax of foreign currency transaction realized and unrealized loss recognized in the income statement.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894

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-Section 50

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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

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-Subparagraph (SX 210.5-03.7(a),(b))

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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The aggregate amount of other expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating expense recognized during the period. Such amounts may include: (a) unusual costs, (b) loss on foreign exchange transactions, (c) losses on securities (net of profits), and (d) miscellaneous other expense items.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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-Article 5

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

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Amount of unrealized gain related to the increase in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

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