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Earnings (Loss) Per Common Share (Tables)
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
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)
2019
 
2018
 
2019
 
2018
Numerator:
 
 
 
 
 
 
 
Net earnings (loss)
$
94,455

 
$
13,753

 
$
101,778

 
$
(6,090
)
Denominator:
 
 
 
 
 
 
 
Weighted-average shares outstanding
54,153

 
53,450

 
54,042

 
53,428

Effect of dilutive stock awards(1)
1,553

 
845

 
1,559

 
—

Weighted-average dilutive shares
55,706

 
54,295

 
55,601

 
53,428

 
 
 
 
 
 
 
 
Basic earnings (loss) per common share
$
1.74

 
$
0.26

 
$
1.88

 
$
(0.11
)
Diluted earnings (loss) per common share
$
1.70

 
$
0.25

 
$
1.83

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

 
—

 
—

 
797

Anti-dilutive performance share units
263

 
222

 
263

 
1,172

Anti-dilutive stock options
1,107

 
2,411

 
1,123

 
2,801


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