v2.4.0.6
FAIR VALUE MEASUREMENTS Table 1 (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Fair Value Assets and Liabilities Measured on Recurring Basis    
Fair Value Assets and Liabilities Measured on Recurring Basis $ (36,120) $ (12,444)
Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Fair Value Assets and Liabilities Measured on Recurring Basis 9,649 5,506
Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Fair Value Assets and Liabilities Measured on Recurring Basis (45,769) (17,950)
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 1,661 2,117
Commodity derivatives 22,209 12,112
Other current assets | Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 1,661 2,117
Commodity derivatives 21,880 10,282
Other current assets | Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 0 0
Commodity derivatives 329 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 0
Other long-term assets, net
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 5,377 27,084
Interest Rate Swaps 581 2,335
Other long-term assets, net | Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 0 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 5,377 27,084
Interest Rate Swaps 581 2,335
Other long-term assets, net | Fair Value Level 3
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 0 0
Interest Rate Swaps 0 0
Accrued liabilities
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances (200) (1,469)
Commodity derivatives (38,192) (5,424)
Interest Rate Swaps (9,796) (22,009)
Accrued liabilities | Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances (200) (1,469)
Commodity derivatives (13,692) (5,424)
Interest Rate Swaps 0 0
Accrued liabilities | Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Product Imbalances 0 0
Commodity derivatives (24,500) 0
Interest Rate Swaps (9,796) (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 0
Other long-term liabilities
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives (6,539)  
Interest Rate Swaps (11,221) (27,190)
Other long-term liabilities | Fair Value Level 1
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 0  
Interest Rate Swaps 0 0
Other long-term liabilities | Fair Value Level 2
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives (6,539)  
Interest Rate Swaps (11,221) (27,190)
Other long-term liabilities | Fair Value Level 3
    
Fair Value Assets and Liabilities Measured on Recurring Basis    
Commodity derivatives 0  
Interest Rate Swaps $ 0 $ 0