Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change in accumulated other comprehensive income (loss)	$ 33,787,000	$ (32,171,000)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	33,861,000	(31,736,000)
Deferred gains/(losses) on cash flow hedging instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	39,000	101,000
Amounts reclassified into income	(106,000)	(496,000)
Amounts reclassified into income for deferred gains/(losses) on cash flow hedging instruments	132,000	620,000
Unrealized gain/(loss) on available for sale investment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	(7,000)	(50,000)
Amounts reclassified into income	0	10,000
Amounts reclassified into income for deferred gains/(losses) on cash flow hedging instruments	0	(16,000)
Intra-entity foreign currency transactions [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	$ 751,000	$ (7,152,000)