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NET INCOME PER SHARE (TABLES)
 6 Months Ended
Jun. 30, 2016
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):

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended June 30,

 

Six Months Ended June 30,

 

    

2016

    

2015

    

2016

    

2015

 

 

 

 

 

 

 

 

 

Shares used in basic earnings per share calculation

 
47,873

 
48,325

 
48,120

 
48,347

Effect of dilutive securities:

 

 

 

 

 

 

 

 

Stock options

 
10

 
397

 
14

 
392

Restricted stock units

 
324

 
321

 
335

 
358

Performance-based restricted stock units

 
14

 
21

 
14

 
16

Total effects of dilutive securities

 
348

 
739

 
363

 
766

Shares used in dilutive earnings per share calculation

 
48,221

 
49,064

 
48,483

 
49,113