Income Taxes - Reconciliation of unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance July 1	$ 86,277	$ 140,662	$ 153,091
Additions for tax positions related to current year	10,145	4,955	2,272
Additions for tax positions of prior years	10,320	798	45
Additions for acquisitions	2,376	43,532	0
Reductions for tax positions of prior years	(1,996)	(41,726)	(927)
Reductions for settlements	(7,165)	(53,520)	(832)
Reductions for expiration of statute of limitations	(2,252)	(3,820)	(9,388)
Effect of foreign currency translation - increase	3,054
Effect of foreign currency translation - decrease		(4,604)	(3,599)
Balance June 30	$ 100,759	$ 86,277	$ 140,662