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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table sets forth the reconciliation of the numerator and the denominator of basic earnings per share and diluted earnings per share for the three and six months ended June 30, 2015 and 2014:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2015
 
2014
 
2015
 
2014
Numerator:
 
 
 
 
 
 
 
Net (loss) income for basic and diluted earnings per share

($24.3
)
 

$28.6

 

($17.4
)
 

$62.3

 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Weighted average shares outstanding, basic
44,779,016

 
45,729,624

 
44,776,190

 
45,729,624

Dilutive effect of stock-based awards

 
519,883

 

 
519,883

Weighted average shares outstanding, diluted
44,779,016

 
46,249,507

 
44,776,190

 
46,249,507

 
 
 
 
 
 
 
 
Basic (loss) earnings per share

($0.54
)
 

$0.63

 

($0.39
)
 

$1.36

Diluted (loss) earnings per share

($0.54
)
 

$0.62

 

($0.39
)
 

$1.35