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Earnings (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Computation of basic and diluted income (loss) per share
The following table sets forth the computation of basic and diluted income (loss) per share:
 
For the Years Ended December 31,
 
2017
 
2016
 
2015
Net income (loss) per share:
 
 
 
 
 
Numerator:
 
 
 
 
 
Net income (loss)
$
(22,862
)
 
$
6,820

 
$
211,388

Denominator:
 
 
 
 
 
Weighted-average common shares outstanding - basic
110,198

 
110,162

 
114,814

Effect of potential dilutive common shares
—

 
2,978

 
2,670

Weighted-average common shares outstanding - diluted
110,198

 
113,140

 
117,484

Basic net income (loss) per share
$
(0.21
)
 
$
0.06

 
$
1.84

Diluted net income (loss) per share
$
(0.21
)
 
$
0.06

 
$
1.80