Postretirement Benefits (Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates (Details) (Postretirement Benefits [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Effect on total of service and interest cost components, 1-Percentage-Point Increase	$ 7
Effect on total of service and interest cost components, 1-Percentage-Point Decrease	(6)
Effect on postretirement benefit obligation as of June 30, 2014, 1-Percentage-Point Increase	178
Effect on postretirement benefit obligation as of June 30, 2014, 1-Percentage-Point Decrease	$ (157)