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Postretirement Benefits (Schedule Of Effect Of One-Percentage-Point Change In Assumed Health Care Cost Trend Rates (Details) - Postretirement Benefits [Member]
$ in Thousands
12 Months Ended
Jun. 30, 2015
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Effect on total of service and interest cost components, 1-Percentage-Point Increase $ 10
Effect on total of service and interest cost components, 1-Percentage-Point Decrease (8)
Effect on postretirement benefit obligation as of June 30, 2015, 1-Percentage-Point Increase 233
Effect on postretirement benefit obligation as of June 30, 2015, 1-Percentage-Point Decrease $ (203)