Stockholders' Equity (Accumulated Other Comprehensive Loss) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss)	$ 11,239,000	$ (23,368,000)	$ (130,480,000)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	11,497,000	(22,951,000)
Deferred gains/(losses) on cash flow hedging instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	39,000	196,000
Amounts reclassified into income	(106,000)	(575,000)
Reclassified into income, before taxes	132,000	1,233,000
Unrealized gain on available for sale investment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	(191,000)	(51,000)
Amounts reclassified into income	0	13,000
Reclassified into income, before taxes	0	21,000
Intra-entity foreign currency transactions
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	$ 493,000	$ (18,385,000)