Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 188,701	$ 821,935	$ 731,434	$ 717,249
Impairment of intangible assets	0
Impairment of long lived assets			$ 2,815
Impairment of goodwill	$ 0	$ 0
Patents [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets, estimated useful life	5 years
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Contract term under revenue recognition	1 year
Estimated useful life of property, plant and equipment, years	2 years
Intangible assets, estimated useful life	2 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Contract term under revenue recognition	3 years
Contract term under foreign exchange	3 years
Estimated useful life of property, plant and equipment, years	10 years
Intangible assets, estimated useful life	15 years
Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of property, plant and equipment, years	40 years