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Business Combinations (Summary of Allocation of Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Aug. 09, 2019 | Jun. 30, 2019 | Jun. 30, 2018
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  | $ 331,159 |  | $ 138,577 | $ 139,082
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 |  | (483) | (408) |  |
Net tangible assets |  | 22,064 | 19,482 |  |
Identifiable intangible assets |  | 52,500 | 53,400 |  |
Goodwill |  | 192,582 | 194,264 |  |
Total intangible assets acquired |  | 245,082 | 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 |  |  |
Other liabilities |  | (75) |  |  |
Net tangible assets |  | 2,582 |  |  |
Identifiable intangible assets | [4] | (900) |  |  |
Goodwill | [1],[2],[3],[4] | (1,682) |  |  |
Total intangible assets acquired |  | $ (2,582) |  |  |
[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
[4] | adjustment to the fair value of intangibles,

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