Income Taxes - Reconciliation of unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	$ 139,907	$ 145,688	$ 164,813
Additions for tax positions related to current year	4,735	7,025	6,090
Additions for tax positions of prior years	2,618	2,582	14,989
Additions for acquisitions	3,939		0
Reductions for tax positions of prior years	(1,175)	(627)	(6,945)
Reductions for settlements	(3,020)	(10,284)	0
Reductions for expiration of statute of limitations	(2,792)	(4,142)	(6,251)
Effect of foreign currency translation - increase	3,294
Effect of foreign currency translation - decrease		(335)	(27,008)
Ending Balance	$ 147,506	$ 139,907	$ 145,688