Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v2.4.0.6
Fair Value Measurements (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Jul. 09, 2010
$150 senior unsecured notes, due July 15, 2020, net of discount
   
Liabilities:    
Debt issued $ 150.0 $ 150.0
Carrying Value
   
Assets:    
Cash and cash equivalents 60.1  
Equity investments 2.2  
Investments in rabbi trust 5.2  
Liabilities:    
Derivative instruments 0.2  
Revolving credit facility 199.0  
$150 senior unsecured notes 148.6  
Quoted Prices in Active Markets (Level 1)
   
Assets:    
Cash and cash equivalents 60.1  
Equity investments 1.2  
Investments in rabbi trust 5.2  
Liabilities:    
$150 senior unsecured notes 160.7  
Significant Other Observable Inputs (Level 2)
   
Liabilities:    
Derivative instruments 0.2  
Revolving credit facility 196.9  
Significant Unobservable Inputs (Level 3)
   
Assets:    
Equity investments $ 1.0