Balance Sheet Accounts (Components of Gross and Net Intangible Asset Balances) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 167,027	$ 121,627
Accumulated Amortization	101,999	97,690
Net Carrying Amount	65,028	23,937
Gross Carrying Amount, Intangibles	169,327	123,027
Net Carrying Amount, Intangibles	67,328	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	$ 2,300	$ 1,400
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	5 years 3 months 19 days	5 years 3 months 19 days
Gross Carrying Amount	$ 91,600	$ 55,400
Accumulated Amortization	44,395	42,689
Net Carrying Amount	$ 47,205	$ 12,711
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 years 10 months 25 days	3 years 3 months 19 days
Gross Carrying Amount	$ 45,600	$ 40,300
Accumulated Amortization	38,051	37,567
Net Carrying Amount	$ 7,549	$ 2,733
Maintenance contracts
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	1 year 1 month 7 days	1 year 3 months 19 days
Gross Carrying Amount	$ 17,000	$ 17,000
Accumulated Amortization	13,317	12,467
Net Carrying Amount	$ 3,683	$ 4,533
Trademarks
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	4 years 8 months 13 days	4 years 3 months 19 days
Gross Carrying Amount	$ 7,500	$ 5,100
Accumulated Amortization	3,057	2,846
Net Carrying Amount	$ 4,443	$ 2,254
Backlogs
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 months 13 days
Gross Carrying Amount	$ 1,500
Accumulated Amortization	892
Net Carrying Amount	$ 608
License agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	6 years 2 months 13 days	6 years 4 months 25 days
Gross Carrying Amount	$ 2,445	$ 2,445
Accumulated Amortization	1,187	1,120
Net Carrying Amount	$ 1,258	$ 1,325
Other intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 years 4 months 25 days	2 years 8 months 13 days
Gross Carrying Amount	$ 1,382	$ 1,382
Accumulated Amortization	1,100	1,001
Net Carrying Amount	$ 282	$ 381