Pension and Other Postretirement Benefits - Amounts Related to Defined Pension Plans Recognized in Accumulated Other Comprehensive (Loss) Income (Details) - Pension plans contribution [Member] - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Unrecognized Net Actuarial Losses	$ 272,802	$ 196,567
Unrecognized Net Prior Service Credits	155	(953)
Unrecognized Transition Obligations	740	651
Total	$ 273,697	$ 196,265