Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change in accumulated other comprehensive income (loss)	$ 14,663,000	$ (21,292,000)	$ (68,760,000)	$ (85,966,000)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	14,630,000	(20,103,000)	(68,329,000)	(85,690,000)
Deferred gains/(losses) on cash flow hedging instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	2,000	753,000	103,000	4,024,000
Amounts reclassified into income	(19,000)	(1,962,000)	(525,000)	(4,188,000)
Reclassification from accumulated other comprehensive income	23,000	2,546,000	1,173,000	5,492,000
Unrealized gain/(loss) on available for sale investment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	47,000	20,000	(22,000)	(112,000)
Amounts reclassified into income	3,000	0	13,000	0
Reclassification from accumulated other comprehensive income	(5,000)	0	(21,000)	0
Intra-entity foreign currency transactions [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications	$ (2,017,000)	$ 20,272,000	$ 18,043,000	$ 62,083,000