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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Reconciliation of Numerators and Denominators Used in Computations of Both Basic and Diluted Earnings Per Share
The following table reconciles the numerators and denominators used in the computations of both basic and diluted earnings (loss) per share:
 
Year Ended December 31
 
2014
 
2013
 
2012
 
(In thousands, except share data)
Basic earnings (loss) per share computation:
 
 
 
 
 
Numerator:
 
 
 
 
 
Income (loss) from continuing operations
$
(20,187
)
 
$
325,359

 
$
23,815

Denominator:
 
 
 
 
 
Average common shares
93,916,656

 
93,785,611

 
92,375,378

Basic earnings (loss) per share from continuing operations
$
(0.22
)
 
$
3.47

 
$
0.26

Diluted earnings (loss) per share computation:
 
 
 
 
 
Numerator:
 
 
 
 
 
Income (loss) from continuing operations
$
(20,187
)
 
$
325,359

 
$
23,815

Denominator:
 
 
 
 
 
Average common shares — basic
93,916,656

 
93,785,611

 
92,375,378

Stock option conversion(1)
—

 
670,485

 
245,911

Stock units(2)
—

 
340,140

 
444,623

Average common shares — diluted
93,916,656

 
94,796,236

 
93,065,912

Diluted earnings (loss) per share from continuing operations
$
(0.22
)
 
$
3.43

 
$
0.26

(1) Anti-dilutive options excluded
3,840,637

 
3,554,064

 
7,099,437

(2) Anti-dilutive stock units excluded
312,971

 
7,071

 
8,192