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Stock-based Compensation (Schedule Of Restricted Stock) (Details) - 6 months ended Jun. 30, 2015 - $ / shares
shares in Thousands
Total
Share-based Compensation Arrangement by Share-based Payment Award  
Number of restricted stock units granted to employees (in shares) 1,300
Weighted-average grant date fair value (in dollars per share) $ 39.77
Time-based Restricted Stock Units  
Share-based Compensation Arrangement by Share-based Payment Award  
Number of restricted stock units granted to employees (in shares) 931
Performance-based Restricted Stock Units  
Share-based Compensation Arrangement by Share-based Payment Award  
Number of restricted stock units granted to employees (in shares) [1] 246
Market-based Restricted Stock Units  
Share-based Compensation Arrangement by Share-based Payment Award  
Number of restricted stock units granted to employees (in shares) [1] 123
[1] *Assumes grant date expected payout