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Net Income Per Share (Tables)
 9 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Net Loss per Share
The following table sets forth the computation of basic and diluted net income per share (in thousands except share data):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
Net income
$
17,457

 
$
3,321

 
$
29,853

 
$
6,493

Denominator for basic earnings per share - weighted average shares
106,871,436

 
105,991,990

 
106,469,278

 
105,927,890

Effect of dilutive securities: Stock options and restricted stock outstanding(a)
10,630,489

 
6,369,189

 
10,077,728

 
6,265,811

Denominator for diluted earnings per share - weighted average shares adjusted for dilutive securities
117,501,925

 
112,361,179

 
116,547,006

 
112,193,701

Income per common share - basic
$
0.16

 
$
0.03

 
$
0.28

 
$
0.06

Income per common share - diluted
$
0.15

 
$
0.03

 
$
0.26

 
$
0.06

(a) Securities outstanding that are included in the computation above, utilizing the treasury stock method are as follows:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
Outstanding stock options
7,916,564

 
5,704,112

 
7,985,521

 
5,767,469

Restricted stock awards
2,713,925

 
665,077

 
2,092,207

 
498,342

 
10,630,489

 
6,369,189

 
10,077,728

 
6,265,811