Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Defined Benefit Plan [Member]
Components of Net Periodic Pension Costs [Abstract]
Interest cost	$ 49	$ 54	$ 147	$ 162
Expected return on plan assets	(63)	(59)	(189)	(177)
Amortization of net loss	40	35	120	105
Net periodic pension cost	26	30	78	90
Supplemental Executive Retirement Plan [Member]
Components of Net Periodic Pension Costs [Abstract]
Net periodic pension cost	219	$ 165	638	$ 487
Postemployment benefits liability	$ 6,000		$ 6,000		$ 5,000