Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Defined Benefit Plan [Member]
Components of Net Periodic Pension Costs [Abstract]
Interest cost	$ 54	$ 55	$ 108	$ 110
Expected return on plan assets	(59)	(62)	(118)	(124)
Amortization of net loss	35	42	70	84
Net periodic pension cost	30	35	60	70
Employer contributions	230		230
Supplemental Executive Retirement Plan [Member]
Components of Net Periodic Pension Costs [Abstract]
Net periodic pension cost	163	$ 107	322	$ 208
Postemployment benefits liability	$ 4,300		$ 4,300		$ 3,900