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
Mar. 31, 2014
Mar. 31, 2013
Restricted Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period, years 3 years 10 months 27 days 4 years
Expected dividend yield 1.32% 1.61%
Estimated average grant date fair value per restricted stock unit (in dollars per share) $ 77.63 $ 51.22