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Earnings (Loss) Per Share (Tables)
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Computation of basic and diluted loss per share
The following table sets forth the computation of basic and diluted net income (loss) per share:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
Net income (loss) per share:
(In thousands, except per share amounts)
Numerator:
 

 
 

 
 
 
 
Net income (loss)
$
(15,357
)
 
$
2,605

 
$
(51,046
)
 
$
5,611

Denominator:
 
 
 
 
 
 
 
Weighted-average shares outstanding - basic
107,737

 
110,060

 
108,542

 
110,758

Effect of potential dilutive common shares
—

 
2,505

 
—

 
3,333

Weighted-average shares outstanding - diluted
107,737

 
112,565

 
108,542

 
114,091

Basic net income (loss) per share
$
(0.14
)
 
$
0.02

 
$
(0.47
)
 
$
0.05

Diluted net income (loss) per share
$
(0.14
)
 
$
0.02

 
$
(0.47
)
 
$
0.05