Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Schedule Of Weighted Average Assumptions For Restricted Stock Units) (Details)

v2.4.0.8
Stock-Based Compensation (Schedule Of Weighted Average Assumptions For Restricted Stock Units) (Details) (Restricted Stock Units [Member], USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Restricted Stock Units [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period, years 4 years 4 days 4 years 4 days 3 years 9 months 29 days 3 years 11 months 5 days
Expected dividend yield 1.49% 1.38% 1.33% 1.59%
Estimated average grant date fair value per restricted stock unit (in dollars per share) $ 35.47 $ 30.14 $ 39.02 $ 25.99