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NET INCOME PER SHARE
12 Months Ended
Dec. 31, 2014
NET INCOME PER SHARE [Abstract]  
NET INCOME PER SHARE

(19)       NET INCOME PER SHARE

The following table sets forth the computation of basic and diluted shares for the periods indicated (in thousands):

    Year Ended December 31,
    2014 2013 2012
         
Shares used in basic earnings per share calculation 49,297  51,338  54,738
 Effect of dilutive securities:     
  Stock options 413  417  378
  Restricted stock units 392  489  424
  Performance-based restricted stock units -  -  -
   Total effects of dilutive securities 805  906  802
Shares used in dilutive earnings per share calculation 50,102  52,244  55,540
         

For the years ended December 31, 2014, 2013 and 2012, 0.1 million, 0.1 million and 0.1 million, respectively, of options to purchase shares of common stock were outstanding but not included in the computation of diluted net income per share because the exercise price exceeded the value of the shares and the effect would have been anti-dilutive. For the years ended December 31, 2014, 2013 and 2012, restricted stock units of 0.2 million, 0.2 million, and 0.8 million, respectively, were outstanding but not included in the computation of diluted net income per share because the effect would have been anti-dilutive. For the years ended December 31, 2014, 2013 and 2012, there were no performance-based restricted stock units outstanding but not included in the computation of diluted net income per share. For the years ended December 31, 2014, 2013 and 2012, restricted stock units that vest based on the Company achieving specified operating income performance targets of 0.1 million, 0.1 million and 0.1 million, respectively, were outstanding but not included in the computation of diluted net income per share because they were determined not to be contingently issuable.