Balance Sheet Accounts (Components of Gross and Net Intangible Asset Balances) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2017
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 200,866	$ 121,627
Accumulated Amortization	115,460	97,690
Net Carrying Amount	85,406	23,937
Gross Carrying Amount, Intangibles		123,027
Net Carrying Amount, Intangibles	$ 85,406	25,337
In-process research and development, with indefinite life
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Fair value of indefinite lived intangibles		$ 1,400
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 9 months 18 days	5 years 3 months 18 days
Gross Carrying Amount	$ 117,500	$ 55,400
Accumulated Amortization	52,860	42,689
Net Carrying Amount	$ 64,640	$ 12,711
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 8 months 12 days	3 years 3 months 18 days
Gross Carrying Amount	$ 51,639	$ 40,300
Accumulated Amortization	39,577	37,567
Net Carrying Amount	$ 12,062	$ 2,733
Maintenance contracts
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	7 months 6 days	1 year 3 months 18 days
Gross Carrying Amount	$ 17,000	$ 17,000
Accumulated Amortization	15,016	12,467
Net Carrying Amount	$ 1,984	$ 4,533
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 8 months 12 days	4 years 3 months 18 days
Gross Carrying Amount	$ 9,100	$ 5,100
Accumulated Amortization	3,776	2,846
Net Carrying Amount	5,324	$ 2,254
Backlogs
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,800
Accumulated Amortization	$ 1,800
License agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	5 years 10 months 24 days	6 years 4 months 24 days
Gross Carrying Amount	$ 2,445	$ 2,445
Accumulated Amortization	1,323	1,120
Net Carrying Amount	$ 1,122	$ 1,325
Other intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	1 year 10 months 24 days	2 years 8 months 12 days
Gross Carrying Amount	$ 1,382	$ 1,382
Accumulated Amortization	1,108	1,001
Net Carrying Amount	$ 274	$ 381