Benefit Plans (Details Textuals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Service Cost	$ 36	$ 38	$ 107	$ 115
Net other periodic post-employment costs	59	201	180	602
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Service Cost	31	31	93	94
Benefit Plans (Textuals) [Abstract]
Contribution to benefit plan			2,700
Expected contribution to benefit plans for remainder of fiscal year	120		120
Retiree Health Care Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Service Cost	5	$ 7	14	$ 21
Benefit Plans (Textuals) [Abstract]
Contribution to benefit plan			143
Expected contribution to benefit plans for remainder of fiscal year	$ 47		$ 47