Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017
Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 55	$ 54	$ 165	$ 161
Expected return on plan assets	(62)	(58)	(186)	(173)
Amortization of net loss	42	49	126	147
Net periodic pension cost	35	45	105	135
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension cost	108	$ 82	316	$ 239
Postemployment benefits liability	$ 3,500		$ 3,500		$ 2,900