Business Combination (Components of Aggregate Estimated Purchase Consideration) (Details) - Aerohive Networks, Inc. $ in Thousands	Aug. 09, 2019 USD ($)
Business Acquisition [Line Items]
Cash paid to acquire outstanding shares	$ 263,616
Replacement of stock-based awards	3,530
Aggregate estimated purchase consideration	$ 267,146

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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