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Net Income (Loss) Per Common Share
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Net Income (Loss) Per Common Share
Net Income (Loss) Per Common Share
A summary of net income (loss) per common share is presented below:
 
Year Ended
December 31,
(in thousands, except per share amounts)
2017
 
2016
 
2015
Net income (loss)
$
123,385

 
$
26,762

 
$
(14,746
)
 
 
 
 
 
 
Basic weighted-average common shares outstanding
37,276

 
32,044

 
24,440

Effect of dilutive stock options
288

 
612

 
—

Effect of dilutive restricted stock
1,296

 
—

 
—

Effect of dilutive performance restricted stock
32

 
—

 
—

Diluted weighted-average common shares outstanding
38,892

 
32,656

 
24,440

 
 
 
 
 
 
Basic income (loss) per common share
$
3.31

 
$
0.84

 
$
(0.60
)
Diluted income (loss) per common share
$
3.17

 
$
0.82

 
$
(0.60
)
 
 
 
 
 
 
Antidilutive securities excluded from diluted net income (loss) per common share
604

 
1,563

 
2,269