Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020
Defined Benefit Plan [Member]
Components of Net Periodic Pension Costs [Abstract]
Interest cost	$ 41	$ 49	$ 122	$ 147
Expected return on plan assets	(64)	(63)	(191)	(189)
Amortization of net loss	52	40	157	120
Net periodic pension cost	29	26	88	78
Supplemental Executive Retirement Plan [Member]
Components of Net Periodic Pension Costs [Abstract]
Net periodic pension cost	267	$ 219	793	$ 638
Postemployment benefits liability	$ 7,700		$ 7,700		$ 6,400