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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2014
Earnings Per Share  
Earnings per share
Year ended December 31,2014 2013 2012
(Dollars and shares in thousands, except earnings per share)     
Net income (loss) attributable to U.S. Cellular shareholders$ (42,812) $ 140,038 $ 111,006
          
Weighted average number of shares used in basic earnings (loss) per share  84,213   83,968   84,645
Effect of dilutive securities:        
 Stock options (1)  -   211   184
 Restricted stock units (1)  -   551   401
         
Weighted average number of shares used in diluted earnings (loss) per share  84,213   84,730   85,230
          
Basic earnings (loss) per share attributable to U.S. Cellular shareholders$ (0.51) $ 1.67 $ 1.31
          
Diluted earnings (loss) per share attributable to U.S. Cellular shareholders$ (0.51) $ 1.65 $ 1.30
          
(1) There were no effects of dilutive securities for the year ended December 31, 2014 due to the net loss for the year.
Summary of antidilutive shares
Year Ended December 31,2014 2013 2012
(Shares in thousands)     
Stock options 3,279  2,010  2,123
       
Restricted stock units 1,186  190  369