Employee Benefit Plans - Other Changes in Plan Assets and Benefit Obligations Recognized in OCI (Details) - Postretirement Benefits Other Than Pension - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unrecognized actuarial loss	$ (2,751)	$ (3,141)
Amortization of net gain (loss)	500	880
Amortization of prior service cost	(1,757)	(1,757)
Total recognized in OCI	5,008	5,778
Defined Benefit Plan, Net Periodic Benefit Cost	(119)	(891)	$ 1,191
Total recognized in net periodic benefit cost and OCI	$ 4,889	$ 4,887