Employee Benefit Plans - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Retirement Benefits [Abstract]
Employee stock ownership plan, requisite service for eligibility	1000 hours
Employee stock ownership plan, period for eligibility	12 months
Employee stock ownership plan, minimum age for eligibility	21 years
Employer matching contribution, percent of match	50.00%
Employer matching contribution, percent of employees' gross pay	6.00%
Employee service period	6 years
Defined contribution plan, administrative expenses	$ 782	$ 810	$ 737
ESOP compensation expense	1,195	1,422	1,367
Executive Medical Care Plan (EMCP) expenses	260	210	$ 224
Executive Medical Care Plan (EMCP) accrued expenses	$ 5,301	$ 5,289