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Earnings Per Common Share
 12 Months Ended
Dec. 31, 2017
Earnings Per Common Share [Abstract]  
Earnings Per Share [Text Block]
Earnings Per Common Share
Summarized basic and diluted earnings per common share were calculated as follows: 
 
Year Ended December 31,
 (In thousands, except per share data)
2017
 
2016
 
2015
Numerator:
 
 
 
 
 
Net earnings (loss)
$
6,653

 
$
(105,195
)
 
$
(953,520
)
Denominator:
 
 
 
 
 
Weighted-average shares outstanding
53,282

 
53,121

 
53,050

Effect of dilutive stock awards(1)
562

 
—

 
—

Weighted-average dilutive shares
53,844

 
53,121

 
53,050

 
 
 
 
 
 
Basic earnings (loss) per share
$
0.12

 
$
(1.98
)
 
$
(17.97
)
Diluted earnings (loss) per share
$
0.12

 
$
(1.98
)
 
$
(17.97
)
Anti-dilutive securities excluded from diluted earnings (loss) per common share:
 
 
 
 
 
Anti-dilutive restricted share units
—

 
482

 
257

Anti-dilutive performance share units
329

 
880

 
611

Anti-dilutive stock options

2,554

 
3,072

 
2,586

(1) 
There was no dilutive effect to the loss per common share for the years ended December 31, 2016 and 2015 due to the net loss incurred for both periods.