Earnings Per Share (Details) 1
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Earnings Per Share [Abstract]    
Weighted average number of shares used in computing basic EPS 206,525,188 205,576,875
Add dilutive common stock equivalents:    
Outstanding stock options and restricted stock units 561,489 [1] 846,674 [1]
Weighted average number of shares used in computing diluted EPS 207,086,677 206,423,549
[1] Excludes 1,389,283 and 503,379 common stock equivalents for the three-month period ended March 31, 2014 and 2013 because their effect was anti-dilutive.