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Subsequent Event	6 Months Ended
Subsequent Event	Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On July 12, 2017, we acquired Komand, Inc. (Komand), a security orchestration and automation company based in Boston, Massachusetts for total cash consideration of $14.8 million. In addition, certain retained employees of Komand (i) received an aggregate of 295,600 restricted stock units which will vest over four years and (ii) shall be eligible for an aggregate of up to $5.0 million of incentive payments contingent on achievement of certain milestones within four years of the acquisition; each restricted stock unit and incentive payment is subject to the employee's continued service. The acquisition will be accounted for under the acquisition method of accounting with the operations of the newly acquired entity included in our operating results from the date of acquisition.