Intangible Assets (Components of Gross and Net Intangible Asset Balances) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 234,066	$ 234,066
Accumulated Amortization	174,163	165,672
Net Carrying Amount	$ 59,903	$ 68,394
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 years 2 months 12 days	2 years 4 months 24 days
Gross Carrying Amount	$ 156,100	$ 156,100
Accumulated Amortization	110,420	103,806
Net Carrying Amount	$ 45,680	$ 52,294
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	4 years 9 months 18 days	4 years 9 months 18 days
Gross Carrying Amount	$ 63,039	$ 63,039
Accumulated Amortization	50,914	49,598
Net Carrying Amount	$ 12,125	$ 13,441
Backlogs
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	0 years	0 years
Gross Carrying Amount	$ 400	$ 400
Accumulated Amortization	$ 400	$ 400
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	1 year 2 months 12 days	1 year 4 months 24 days
Gross Carrying Amount	$ 10,700	$ 10,700
Accumulated Amortization	9,047	8,554
Net Carrying Amount	$ 1,653	$ 2,146
License agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	6 years 2 months 12 days	5 years 9 months 18 days
Gross Carrying Amount	$ 2,445	$ 2,445
Accumulated Amortization	2,000	1,932
Net Carrying Amount	$ 445	$ 513
Other intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	0 years	0 years
Gross Carrying Amount	$ 1,382	$ 1,382
Accumulated Amortization	$ 1,382	$ 1,382