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Net Income (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Summary of Net Income (Loss) Per Share
The following table summarizes the computation of basic and diluted net income (loss) per share.
 
 
Year Ended December 31,
 
 
2018
 
2017
 
2016
Income (loss) from continuing operations
 
$
(264,467
)
 
$
25,364

 
$
(9,490
)
Income from discontinued operations, net of tax
 
—

 
137,688

 
16,153

Net income (loss)
 
$
(264,467
)
 
$
163,052

 
$
6,663

 
 
 
 
 
 
 
Weighted average shares outstanding
 
31,678

 
27,433

 
27,016

Effect of dilutive stock options
 
—

 
322

 
—

Diluted shares outstanding
 
31,678

 
27,755

 
27,016

 
 
 
 
 
 
 
Basic income (loss) from continuing operations per share
 
$
(8.35
)
 
$
0.92

 
$
(0.35
)
Basic income from discontinued operations per share
 
—

 
5.02

 
0.60

Basic net income (loss) per share
 
$
(8.35
)
 
$
5.94

 
$
0.25

 
 
 
 
 
 
 
Diluted income (loss) from continuing operations per share
 
$
(8.35
)
 
$
0.91

 
$
(0.35
)
Diluted income from discontinued operations per share
 
—

 
4.96

 
0.60

Diluted net income (loss) per share
 
$
(8.35
)
 
$
5.87

 
$
0.25

Cash dividends declared per common share
 
$
0.28

 
$
0.28

 
$
0.28