XML 75 R44.htm IDEA: XBRL DOCUMENT v3.10.0.1
Quarterly financial data (unaudited) (Tables)
 12 Months Ended
Dec. 31, 2018
Quarterly financial data (unaudited) [Abstract]  
Quarterly Financial Information
Quarterly financial information for the years ended December 31, 2018 and 2017 is presented in the following tables:

  
Quarter Ended
 
(in millions, except per share data)
 
March 31,
  
June 30,
  
September 30,
  
December 31,
 
2018:
            
Revenue
 
$
117.8
  
$
220.2
  
$
173.7
  
$
270.7
 
Income (loss) from operations
  
(9.5
)
  
66.8
   
21.3
   
11.2
 
Net income (loss)
  
(4.9
)
  
50.1
   
20.9
   
(3.4
)
                 
Net income (loss) per share-basic
 
$
(0.10
)
 
$
1.00
  
$
0.42
  
$
(0.07
)
Net income (loss) per share-diluted
 
$
(0.10
)
 
$
0.98
  
$
0.41
  
$
(0.07
)
                 
2017:
                
Revenue
 
$
116.9
  
$
100.8
  
$
149.4
  
$
193.8
 
Income from operations
  
14.9
   
8.5
   
47.8
   
53.1
 
Net income
  
10.5
   
4.6
   
33.6
   
33.9
 
                 
Net income per share-basic
 
$
0.26
  
$
0.11
  
$
0.81
  
$
0.77
 
Net income per share-diluted
 
$
0.23
  
$
0.11
  
$
0.68
  
$
0.67