Pension and Other Postretirement Benefits - Amounts Related to Other Postretirement Benefit Plans Recognized in Accumulated Other Comprehensive (Loss) Income (Details) - Other postretirement benefit plans [Member] - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Unrecognized Net Actuarial Losses	$ 5,969	$ 8,554
Unrecognized Net Prior Service Credits	(172)	(452)
Total	$ 5,797	$ 8,102