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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Summary of Weighted-Average Outstanding Share-Based Awards Excluded from Computation of Diluted Earnings Per Share

The following table shows the weighted average number of outstanding share-based awards not included in the computation of diluted earnings per share as the effect of including such share-based awards in the computation would be anti-dilutive (in thousands):

 

        Three Months Ended June 30,                  Six Months Ended June 30,          
    2014      2013      2014      2013  

Weighted average shares subject to anti-dilutive share-based awards

             1,598                    1,217                    1,182                    1,424