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NET INCOME PER SHARE (TABLES)
 12 Months Ended
Dec. 31, 2015
NET INCOME PER SHARE [Abstract]  
Schedule of Diluted Shares Calculation

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

 

 

 

 

 

 

 

 

 

 

 

 

 

Year Ended December 31,

 

 

    

    

2015

    

2014

    

2013

 

 

 

 

 

 

 

 

 

 

Shares used in basic earnings per share calculation

 

 
48,370

 
49,297

 
51,338

 

Effect of dilutive securities:

 

 

 

 

 

 

 

 

Stock options

 

 
275

 
413

 
417

 

Restricted stock units

 

 
338

 
392

 
489

 

Performance-based restricted stock units

 

 
28

 

—

 

—

 

Total effects of dilutive securities

 

 
641

 
805

 
906

 

Shares used in dilutive earnings per share calculation

 

 
49,011

 
50,102

 
52,244