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NET INCOME PER SHARE
 3 Months Ended
Mar. 31, 2012
NET INCOME PER SHARE [Abstract]  
NET INCOME PER SHARE

(12)       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,
    2012 2011
Shares used in basic earnings per share calculation  56,493   57,190
 Effect of dilutive securities:     
  Stock options  396   951
  Restricted stock units  529   656
  Performance-based restricted stock units  -   -
   Total effects of dilutive securities  925   1,607
Shares used in dilutive earnings per share calculation  57,418   58,797
         

For the three months ended March 31, 2012 and 2011, 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, 2012 and 2011, restricted stock units (“RSUs”) of 1.2 million and 0.5 million, respectively, were outstanding, but not included in the computation of diluted net income per share because the effect would have been anti-dilutive.