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