Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Change in plan assets:
Fair value of plan assets at beginning of year	$ 7,245
Fair value of plan assets at end of year	7,185	$ 7,245
Amounts recognized in the consolidated balance sheets:
Post-employment benefits	19,627	23,611
Pension Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of the year	34,558	40,664
Service cost	97	77	$ 78
Interest cost	896	1,180	1,260
Plan participants’ contributions	0	0
Benefits paid	(6,697)	(7,251)
Amendments	(8)	188
Actuarial (gain) loss during year	1,148	(300)
Benefit obligation at end of year	29,994	34,558	40,664
Change in plan assets:
Fair value of plan assets at beginning of year	7,245	6,697
Actual gain (loss) on plan assets	247	763
Employer contributions	6,390	7,036
Fair value of plan assets at end of year	7,185	7,245	6,697
Funded status at end of year	(22,809)	(27,313)
Amounts recognized in the consolidated balance sheets:
Other current liabilities	5,256	6,390
Post-employment benefits	17,553	20,923
Net amount recognized	22,809	27,313
Amounts recognized in accumulated other comprehensive income (loss):
Net actuarial (loss) gain	(7,311)	(6,474)
Prior service cost	(208)	(293)
Total amounts recognized in accumulated other comprehensive (loss) income	(7,519)	(6,767)
Postretirement Health Coverage [Member]
Change in benefit obligation:
Benefit obligation at beginning of the year	2,790	3,719
Service cost	53	48	80
Interest cost	95	139	188
Plan participants’ contributions	64	63
Benefits paid	$ (238)	(246)
Amendments		0
Actuarial (gain) loss during year	$ (620)	(933)
Benefit obligation at end of year	2,144	2,790	3,719
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual gain (loss) on plan assets	0	0
Employer contributions	174	183
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	(2,144)	(2,790)
Amounts recognized in the consolidated balance sheets:
Other current liabilities	220	220
Post-employment benefits	1,924	2,570
Net amount recognized	2,144	2,790
Amounts recognized in accumulated other comprehensive income (loss):
Net actuarial (loss) gain	1,492	960
Prior service cost	1,219	1,490
Total amounts recognized in accumulated other comprehensive (loss) income	$ 2,711	$ 2,450