Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Defined Benefit Plan [Member]
Components of Net Periodic Pension Costs [Abstract]
Interest cost	$ 54	$ 55	$ 162	$ 165
Expected return on plan assets	(59)	(62)	(177)	(186)
Amortization of net loss	35	42	105	126
Net periodic pension cost	30	35	90	105
Employer contributions	230		230
Supplemental Executive Retirement Plan [Member]
Components of Net Periodic Pension Costs [Abstract]
Net periodic pension cost	165	$ 108	487	$ 316
Postemployment benefits liability	$ 4,600		$ 4,600		$ 3,900