Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments (Details 2)

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Derivative Instruments (Details 2) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Fair value of derivative instruments    
Current portion of fair value of derivative assets $ 175,286 $ 183,000
Noncurrent portion of fair value of derivative assets 354,254 677,780
Current portion of fair value of derivative liability 11,907 646
Noncurrent portion of fair value of derivative liability 30,076  
Commodity contracts
   
Fair value of derivative instruments    
Total asset derivatives 529,540 860,780
Total liability derivatives (41,983) (646)
Derivatives not designated as hedges for accounting purposes | Commodity contracts
   
Fair value of derivative instruments    
Current portion of fair value of derivative assets 175,286 183,000
Noncurrent portion of fair value of derivative assets 354,254 677,780
Total asset derivatives 529,540 860,780
Current portion of fair value of derivative liability 11,907 646
Noncurrent portion of fair value of derivative liability 30,076  
Total liability derivatives 41,983 646
Net derivatives $ 487,557 $ 860,134
Derivatives designated as hedges for accounting purposes
   
Fair value of derivative instruments    
Number of derivative instruments held 0