Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Change in plan assets:
Fair value of plan assets at beginning of year	$ 7,185
Fair value of plan assets at end of year	6,737	$ 7,185
Pension Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of the year	29,994	34,558
Service cost	91	97	$ 77
Interest cost	879	896	1,180
Plan participants’ contributions	0	0
Benefits paid	(5,555)	(6,697)
Amendments	0	(8)
Actuarial loss (gain) during year	1,196	1,148
Benefit obligation at end of year	26,605	29,994	34,558
Change in plan assets:
Fair value of plan assets at beginning of year	7,185	7,245
Actual (loss) gain on plan assets	(149)	247
Employer contributions	5,256	6,390
Plan participants’ contributions	0	0
Fair value of plan assets at end of year	6,737	7,185	7,245
Funded status at end of year	(19,868)	(22,809)
Postretirement Health Coverage [Member]
Change in benefit obligation:
Benefit obligation at beginning of the year	2,144	2,790
Service cost	22	53	48
Interest cost	75	95	139
Plan participants’ contributions	60	64
Benefits paid	(229)	(238)
Amendments	0	0
Actuarial loss (gain) during year	163	(620)
Benefit obligation at end of year	2,235	2,144	2,790
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual (loss) gain on plan assets	0	0
Employer contributions	169	174
Plan participants’ contributions	60	64
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	$ (2,235)	$ (2,144)