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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]        
Gain on Settled Commodity Derivatives $ 43,837 $ 18,386 $ 152,782 $ 35,666
Gain (Loss) on Unsettled Commodity Derivatives (70,198) 57,506 124,800 (62,806)
Gain (Loss) on Commodity Derivatives, Net $ (26,361) $ 75,892 $ 277,582 $ (27,139)