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Income (Loss) per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Computation of Basic and Diluted Income (Loss) Per Share
The following table sets forth the computation of basic and diluted income (loss) per share (in thousands, except per share amounts):
 
Three Months Ended March 31,
 
2018
 
2017
Net income
$
15,185

 
$
27,786

Less: Undistributed income allocated to participating securities (1)
192

 
299

Net income attributable to common stockholders
14,993

 
27,487

Plus: Net income effect of convertible securities
—

 
2,509

Numerator for diluted income per common share
$
14,993

 
$
29,996

 
 
 
 
Basic weighted-average common stock shares outstanding
45,634

 
45,476

Plus: dilutive effects of common stock equivalents
43

 
6,389

Diluted weighted-average common stock shares outstanding
45,677

 
51,865

 
 
 
 
Basic income per common share
$
0.33

 
$
0.60

Diluted income per common share 
$
0.33

 
$
0.58

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(1)
Participating securities include restricted stock that has been issued but has not yet vested.