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Business Combination (Narratives) (Details) - USD ($) $ in Thousands	Aug. 09, 2019	Mar. 31, 2021	Jun. 30, 2020
Business Acquisition [Line Items]
Goodwill		$ 331,159	$ 331,159
Aerohive Networks, Inc.
Business Acquisition [Line Items]
Business acquisition, cash consideration	$ 267,100
Business acquisition, date of acquisition	Aug. 09, 2019
Goodwill	$ 192,600
Identifiable intangible assets	$ 52,500