Acquisitions - Summary of Supplemental Information on Unaudited Pro Forma Basis (Detail) (Skyfence Networks Ltd. [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Skyfence Networks Ltd. [Member]
Business Acquisition [Line Items]
Pro forma revenue	$ 42,675	$ 35,102	$ 112,633	$ 95,026
Pro forma loss from operations	(13,426)	(6,396)	(47,294)	(23,720)
Pro forma net loss	$ (13,581)	$ (6,421)	$ (47,265)	$ (23,961)

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

+ Details

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