Balance Sheet Accounts (Components of Gross and Net Intangible Asset Balances) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2017
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 199,137	$ 121,627
Accumulated Amortization	108,712	97,690
Net Carrying Amount	90,425	23,937
Gross Carrying Amount, Intangibles	201,637	123,027
Net Carrying Amount, Intangibles	92,925	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	$ 2,500	$ 1,400
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	4 years 6 months	5 years 3 months 19 days
Gross Carrying Amount	$ 116,000	$ 55,400
Accumulated Amortization	48,334	42,689
Net Carrying Amount	$ 67,666	$ 12,711
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 10 months 25 days	3 years 3 months 19 days
Gross Carrying Amount	$ 51,410	$ 40,300
Accumulated Amortization	38,674	37,567
Net Carrying Amount	$ 12,736	$ 2,733
Maintenance contracts
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	9 months 19 days	1 year 3 months 19 days
Gross Carrying Amount	$ 17,000	$ 17,000
Accumulated Amortization	14,166	12,467
Net Carrying Amount	$ 2,834	$ 4,533
Trademarks
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 10 months 25 days	4 years 3 months 19 days
Gross Carrying Amount	$ 9,100	$ 5,100
Accumulated Amortization	3,411	2,846
Net Carrying Amount	5,689	$ 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	6 years 1 month 7 days	6 years 4 months 25 days
Gross Carrying Amount	$ 2,445	$ 2,445
Accumulated Amortization	1,255	1,120
Net Carrying Amount	$ 1,190	$ 1,325
Other intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 years 2 months 13 days	2 years 8 months 13 days
Gross Carrying Amount	$ 1,382	$ 1,382
Accumulated Amortization	1,072	1,001
Net Carrying Amount	$ 310	$ 381