Goodwill and Intangible Assets (Components of Gross and Net Intangible Asset Balances) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 234,966	$ 181,566
Accumulated Amortization	138,879	130,454
Net Carrying Amount	$ 96,087	$ 51,112
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years	2 years 4 months 24 days
Gross Carrying Amount	$ 157,000	$ 117,000
Accumulated Amortization	83,823	77,449
Net Carrying Amount	$ 73,177	$ 39,551
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 8 months 12 days	2 years
Gross Carrying Amount	$ 63,039	$ 51,639
Accumulated Amortization	45,544	44,410
Net Carrying Amount	$ 17,495	$ 7,229
Backlogs
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	0 years
Gross Carrying Amount	$ 400
Accumulated Amortization	$ 400
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	1 year 7 months 6 days	2 years 4 months 24 days
Gross Carrying Amount	$ 10,700	$ 9,100
Accumulated Amortization	6,061	5,647
Net Carrying Amount	$ 4,639	$ 3,453
License agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	5 years 4 months 24 days	5 years 4 months 24 days
Gross Carrying Amount	$ 2,445	$ 2,445
Accumulated Amortization	1,729	1,661
Net Carrying Amount	$ 716	$ 784
Other intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 months 18 days	7 months 6 days
Gross Carrying Amount	$ 1,382	$ 1,382
Accumulated Amortization	1,322	1,287
Net Carrying Amount	$ 60	$ 95