Stock-Based Compensation (Schedule Of Aggregate Number Of Shares And Cash That Could Be Awarded To Key Executives) (Details) shares in Thousands	Jun. 30, 2017 shares
2015-2017 [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	11
2015-2017 [Member] | Target [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	28
2015-2017 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	55
2016-2018[Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	9
2016-2018[Member] | Target [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	23
2016-2018[Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	45