Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments - Fair value gains (Details)

v3.5.0.2
Derivative Instruments - Fair value gains (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Summary of realized and unrealized gains (losses) on derivative instruments        
Commodity derivative fair value gains (losses) $ (684,634) $ (2,227) $ (404,710) $ 757,327
Revenue        
Summary of realized and unrealized gains (losses) on derivative instruments        
Commodity derivative fair value gains (losses) $ (684,634) $ (2,227) $ (404,710) $ 757,327