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Income Taxes (Narratives) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016
Operating Loss Carryforwards [Line Items] |  |  |  |
Provision for income taxes | $ 1,166 | $ 866 | $ 3,252 | $ 2,967
Unrecognized tax benefits | 19,400 |  | 19,400 |
Unrecognized tax benefit future impact if recognized | 19,300 |  | 19,300 |
Enterasys and Zebra WLAN Business |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax amortization deduction for capitalized goodwill | 1,300 |  | 3,700 |
Deferred tax liability, goodwill | $ 5,800 |  | $ 5,800 |
Amortization period for tax purposes |  |  | 15 years |

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