Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 55	$ 53	$ 110	$ 107
Expected return on plan assets	(62)	(46)	(124)	(115)
Amortization of net loss	42	49	84	98
Net periodic pension cost	35	56	70	90
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension cost	107	$ 81	208	$ 158
Postemployment benefits liability	$ 3,300		$ 3,300		$ 2,900