Pension and Other Postretirement Benefits - Components of Net Periodic Pension (Income) Cost (Details) - Pension plans contribution [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Net periodic pension (income) cost
Service cost	$ 5,474	$ 6,910	$ 7,797
Interest cost	39,007	41,084	38,183
Expected Return on Plans' Assets	(59,698)	(59,527)	(56,111)
Amortization of transition obligation	78	78	69
Amortization of prior service cost	(361)	(234)	(195)
Special termination benefit charge	459	0	0
Curtailment loss	(358)	0	0
Settlement Loss	261	0	158
Recognition of actuarial losses	3,671	2,642	14,961
Net Periodic Benefit (Income) Cost	$ (10,751)	$ (9,047)	$ 4,862