Derivatives Instruments Designated as Cash Flow Hedges - (Detail) - Cash Flow Hedging [Member] - Foreign Exchange Contract [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI (Effective Portion)	$ 434	$ (141)	$ 2,307	$ 201
Cost of revenue [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	255	27	433	(4)
Selling, General and Administrative Expenses [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	194	22	331	(3)
Research and development [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	$ 300	$ 37	$ 510	$ (6)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and 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 (c)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

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