Income Taxes - Reconciliation of the Reserve For Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Reconciliation of the reserve for uncertain tax positions
Uncertain tax positions, beginning of year	$ 5,380	$ 3,931	$ 3,921
Gross (decreases) increases - tax positions in prior period	(2,216)	407	544
Gross increases—tax positions in current period	0	1,789	0
Gross decreases—lapse of statutes	(1,032)	(740)	(637)
Currency translation adjustment	(26)	(7)	103
Uncertain tax positions, end of year	$ 2,106	$ 5,380	$ 3,931