v2.4.0.6
FAIR VALUE MEASUREMENTS Table 1 (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Fair Value Assets and Liabilities Measured on Recurring Basis    
Fair Value Assets and Liabilities Measured on Recurring Basis $ (12,444) $ 1,442
Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Fair Value Assets and Liabilities Measured on Recurring Basis 5,506 (14,738)
Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Fair Value Assets and Liabilities Measured on Recurring Basis (17,950) 16,180
Fair Value Level 3
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Fair Value Assets and Liabilities Measured on Recurring Basis 0 0
Other current assets
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 2,117 991
Commodity derivatives 12,112  
Other current assets | Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 2,117 991
Commodity derivatives 10,282  
Other current assets | Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 0 0
Commodity derivatives 1,830  
Other current assets | Fair Value Level 3
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 0 0
Commodity derivatives 0  
Other long-term assets, net
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 27,084  
Interest Rate Swaps 2,335 45,663
Other long-term assets, net | Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 0  
Interest Rate Swaps 0 0
Other long-term assets, net | Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 27,084  
Interest Rate Swaps 2,335 45,663
Other long-term assets, net | Fair Value Level 3
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 0  
Interest Rate Swaps 0 0
Accrued liabilities
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances (1,469) (988)
Commodity derivatives (5,424) (14,741)
Interest Rate Swaps (22,009)  
Accrued liabilities | Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances (1,469) (988)
Commodity derivatives (5,424) (14,741)
Interest Rate Swaps 0  
Accrued liabilities | Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 0 0
Commodity derivatives 0 0
Interest Rate Swaps (22,009)  
Accrued liabilities | Fair Value Level 3
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 0 0
Commodity derivatives 0 0
Interest Rate Swaps 0  
Other long-term liabilities
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Interest Rate Swaps (27,190) (29,483)
Other long-term liabilities | Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Interest Rate Swaps 0 0
Other long-term liabilities | Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Interest Rate Swaps (27,190) (29,483)
Other long-term liabilities | Fair Value Level 3
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Interest Rate Swaps $ 0 $ 0