Employee Benefit Plans - Change in Projected Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Change in projected benefit obligation
Projected benefit obligation at beginning of year	$ 77,915	$ 79,353
Interest cost	1,675	1,682	$ 2,112
Benefits paid	(2,426)	(2,260)
Actuarial gain	(14,085)	(860)
Projected benefit obligation at end of year	$ 63,079	$ 77,915	$ 79,353