Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments (Details 3)

v2.4.0.8
Derivative Instruments (Details 3) (Commodity derivative, USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Commodity derivative
   
Commodity derivative assets    
Gross amounts on balance sheet $ 632,885 $ 887,034
Gross amounts offset on balance sheet (103,345) (26,254)
Total asset derivatives 529,540 860,780
Commodity derivative liabilities    
Gross amounts on balance sheet (55,818) (646)
Gross amounts offset on balance sheet 13,835  
Total liability derivatives $ (41,983) $ (646)