Business combinations (Estimated Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013	Oct. 31, 2013 Enterasys Networks, Inc.
Business Acquisition [Line Items]
Cash				$ 4,969
Receivables				25,699
Inventory				33,662
Other current assets				8,888
Property and equipment				23,122
Identifiable intangible assets				108,900
In-process research and development				3,000
Deferred tax assets				9
Other assets				7,343
Goodwill	57,922		0	57,922
Current liabilities				(75,394)
Other long term liabilities				(13,151)
Total purchase price allocation				184,969
Less: Cash acquired from acquisition				(4,969)
Total purchase price consideration, net of cash acquired	$ 180,000	$ 0		$ 180,000