v2.4.0.6
DEBT Narrative (Details) (USD $)
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Debt Instrument [Line Items]    
Proceeds from senior note offering, net of issuance costs $ 247,408,000 $ 0
2007 Revolving Credit Agreement
    
Debt Instrument [Line Items]    
Amount borrowed during the period 436,100,000  
Maximum borrowing capacity 1,200,000,000  
Term five-year  
Amount repaid during the period 203,900,000  
Interest rate at period end 0.80%  
Current remaining borrowing capacity 411,600,000  
Covenant terms as of the end of any four consecutive fiscal quarters, a consolidated debt coverage ratio not to exceed 5.00-to-1.00  
Debt coverage ratio 4.6  
4.75% Senior Notes
    
Debt Instrument [Line Items]    
Issuance date February 2, 2012  
Face amount 250,000,000  
Stated interest rate 4.75%  
Proceeds from senior note offering, net of issuance costs 247,400,000  
Description of use of proceeds repay the outstanding principal amount of NuPOP’s 7.75% senior notes due February 15, 2012  
Payment terms The interest on the 4.75% senior notes is payable semi-annually in arrears on February 1 and August 1 of each year  
Date of first required interest payment August 1, 2012  
Maturity date Feb. 01, 2022  
GoZone Bonds
    
Debt Instrument [Line Items]    
Interest rate at period end 0.10%  
Amount received from trustee 18,000,000  
Amount remaining in trust 155,300,000  
Short Term Line of Credit
    
Debt Instrument [Line Items]    
Amount borrowed during the period 56,400,000  
Maximum borrowing capacity 20,000,000  
Amount repaid during the period 56,400,000  
Amount outstanding $ 0