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NET INCOME PER SHARE
 3 Months Ended
Mar. 31, 2013
NET INCOME PER SHARE [Abstract]  
NET INCOME PER SHARE

(13)       NET INCOME PER SHARE

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

    Three Months Ended March 31,
    2013 2012
Shares used in basic earnings per share calculation  52,347   56,493
 Effect of dilutive securities:     
  Stock options  391   396
  Restricted stock units  479   529
  Performance-based restricted stock units  -    -
   Total effects of dilutive securities  870   925
Shares used in dilutive earnings per share calculation  53,217   57,418
         

For the three months ended March 31, 2013 and 2012, options to purchase 0.1 million and 0.1 million shares of common stock, respectively, 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 three months ended March 31, 2013 and 2012, restricted stock units (“RSUs”) of 0.4 million and 1.2 million, respectively, were outstanding, but not included in the computation of diluted net income per share because the effect would have been anti-dilutive.