Goodwill and Intangible Assets (Components of Gross and Net Intangible Asset Balances) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2018
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 198,353	$ 200,366
Accumulated Amortization	134,809	123,274
Net Carrying Amount	$ 63,544	$ 77,092
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 years 9 months 18 days	3 years 3 months 18 days
Gross Carrying Amount	$ 117,000	$ 117,000
Accumulated Amortization	67,888	58,299
Net Carrying Amount	$ 49,112	$ 58,701
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 years 6 months	3 years
Gross Carrying Amount	$ 51,639	$ 51,639
Accumulated Amortization	42,522	40,634
Net Carrying Amount	$ 9,117	$ 11,005
Maintenance contracts
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	1 month 6 days	3 months 18 days
Gross Carrying Amount	$ 17,000	$ 17,000
Accumulated Amortization	$ 17,000	15,866
Net Carrying Amount		$ 1,134
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 years 10 months 24 days	3 years 4 months 24 days
Gross Carrying Amount	$ 9,100	$ 9,100
Accumulated Amortization	4,871	4,141
Net Carrying Amount	$ 4,229	$ 4,959
Backlogs
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period		0 years
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 7 months 6 days	5 years 9 months 18 days
Gross Carrying Amount	$ 2,232	$ 2,445
Accumulated Amortization	1,313	1,390
Net Carrying Amount	$ 919	$ 1,055
Other intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	1 year 1 month 6 days	1 year 7 months 6 days
Gross Carrying Amount	$ 1,382	$ 1,382
Accumulated Amortization	1,215	1,144
Net Carrying Amount	$ 167	$ 238