Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE, Part 2 (Details)

v2.4.0.8
FAIR VALUE, Part 2 (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Rate of Senior unsecured notes (in hundredths) 8.00%  
Carrying Amount [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Senior unsecured notes $ 500.0 $ 300.0
Revolving credit facility 45.0 124.0
Estimated Fair Value [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Senior unsecured notes 501.0 310.5
Revolving credit facility $ 45.0 $ 124.0