Income Taxes (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Provision for income taxes	$ 1,179	$ 1,203	$ 2,086	$ 2,101
Unrecognized tax benefits	19,000		19,000
Enterasys Networks, Inc.
Operating Loss Carryforwards [Line Items]
Tax amortization deduction for capitalized goodwill	1,100	$ 1,100
Deferred tax liability, goodwill	$ 5,300		$ 5,300
Amortization period for tax purposes			15 years