Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Gains/Losses on Derivatives (Details)

v3.20.2
DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Gains/Losses on Derivatives (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]        
Gain on Settled Commodity Derivatives $ 77,439 $ 4,734 $ 108,944 $ 17,280
Gain (Loss) on Unsettled Commodity Derivatives (150,077) 31,857 194,999 (120,311)
Gain (Loss) on Commodity Derivatives, Net $ (72,638) $ 36,591 $ 303,943 $ (103,031)