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Business Combination (Summary of Preliminary Allocation of Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Aug. 09, 2019 | Jun. 30, 2019
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | $ 330,184 |  | $ 138,577
Aerohive Networks, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and cash equivalents |  | 44,158 | $ 44,158 |
Short-term investments |  | 45,148 | 45,148 |
Accounts receivable, net |  | 11,753 | 11,753 |
Inventories |  | 19,232 | 16,698 |
Prepaid expenses and other current assets |  | 3,924 | 3,980 |
Property and equipment |  | 2,364 | 2,185 |
Operating lease right-of-use assets |  | 6,336 | 6,336 |
Other assets |  | 2,195 | 2,195 |
Debt |  | (20,000) | (20,000) |
Accounts payable |  | (9,737) | (9,737) |
Accrued compensation and benefits |  | (7,129) | (7,129) |
Accrued warranty |  | (570) | (570) |
Other accrued liabilities |  | (1,960) | (1,960) |
Operating lease liabilities |  | (4,752) | (4,752) |
Deferred revenue |  | (68,415) | (68,415) |
Other liabilities |  | (408) | (408) |
Net tangible assets |  | 22,139 | 19,482 |
Identifiable intangible assets |  | 53,400 | 53,400 |
Goodwill |  | 191,607 | 194,264 |
Total intangible assets acquired |  | 245,007 | 247,664 |
Total net assets acquired |  | 267,146 | $ 267,146 |
Aerohive Networks, Inc. | Adjustments |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Inventories | [1] | 2,534 |  |
Prepaid expenses and other current assets | [2] | (56) |  |
Property and equipment | [3] | 179 |  |
Net tangible assets |  | 2,657 |  |
Goodwill | [1],[2],[3] | (2,657) |  |
Total intangible assets acquired |  | $ (2,657) |  |
[1] | adjustment of the fair value of inventories acquired
[2] | write-off of an asset with no future economic value as of the Acquisition Date
[3] | adjustment to the value of property and equipment as of the Acquisition Date at an international location

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