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Loss Per Common Share
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Loss Per Common Share
Loss Per Common Share
Summarized basic and diluted earnings per common share were calculated as follows:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(in thousands, except per share data)
2018
 
2017
 
2018
 
2017
Numerator:
 
 
 
 
 
 
 
Net earnings (loss)
$
13,753

 
$
(8,893
)
 
$
(6,090
)
 
$
(15,572
)
Denominator:
 
 
 
 
 
 
 
Weighted-average shares outstanding
53,450

 
53,292

 
53,428

 
53,255

Effect of dilutive stock awards(1)
845

 
—

 
—

 
—

Weighted-average dilutive shares
54,295

 
53,292

 
53,428

 
53,255

 
 
 
 
 
 
 
 
Basic earnings (loss) per common share
$
0.26

 
$
(0.17
)
 
$
(0.11
)
 
$
(0.29
)
Diluted earnings (loss) per common share
$
0.25

 
$
(0.17
)
 
$
(0.11
)
 
$
(0.29
)
Anti-dilutive securities excluded from diluted loss per common share:
 
 
 
 
 
 
 
Anti-dilutive restricted share units
—

 
688

 
797

 
688

Anti-dilutive performance share units
222

 
880

 
1,172

 
880

Anti-dilutive stock options
2,411

 
3,251

 
2,801

 
3,251


(1) 
There was no dilutive effect to the loss per common share for the six months ended June 30, 2018 and the three and six months ended June 30, 2017 due to the net loss incurred for respective periods.