Benefit Plans 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Pension Benefits [Member]
Net periodic costs
Service cost	$ 91	$ 97	$ 77
Interest cost	879	896	1,180
Expected return on plan assets	(491)	(495)	(416)
Recognized net actuarial loss (gain)	913	559	611
Amortization of prior service cost	86	86	78
Net periodic cost (benefits)	1,478	1,143	1,530
Postretirement Health Coverage [Member]
Net periodic costs
Service cost	22	53	48
Interest cost	75	95	139
Expected return on plan assets	0	0	0
Recognized net actuarial loss (gain)	(210)	(87)	(38)
Amortization of prior service cost	(271)	(272)	(271)
Net periodic cost (benefits)	$ (384)	$ (211)	$ (122)