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Net (Loss) Income Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The computation of the Company's basic and diluted net income (loss) per share is as follows:
 
Year Ended December 31,
 
2018
 
2017
 
2016
 
(In thousands, except per share data)
Numerator for basic and diluted income per common share:
 
 
 
 
 
Net income (loss)
$
80,354

 
$
(342,750
)
 
$
101,002

Less: Net (income) loss allocated to unvested participating restricted stock
(2,711
)
 
6,768

 
(1,430
)
Net income (loss) available to common stockholders - basic
77,643

 
(335,982
)
 
99,572

     Effect of unvested participating restricted stock
16

 
—

 
2

Numerator - net income (loss) available to common shareholders - diluted
$
77,659

 
$
(335,982
)
 
$
99,574

 
 
 
 
 
 
Denominator:
 
 
 
 
 
Weighted average outstanding shares of common stock - basic
17,533

 
17,725

 
18,030

     Effect of dilutive securities:
 
 
 
 
 
   Stock options
256

 
15

 
95

Weighted average outstanding shares of common stock - diluted
17,789

 
17,740

 
18,125

Net income (loss) per common share:
 
 
 
 
 
Basic
$
4.43

 
$
(18.96
)
 
$
5.52

Diluted
$
4.37

 
$
(18.96
)
 
$
5.49