Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS (Derivative Instruments in Financial Position) (Details)

v3.21.1
DERIVATIVE INSTRUMENTS (Derivative Instruments in Financial Position) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Short-term derivative asset $ 12,422 $ 27,146
Long-term derivative asset 652 322
Short-term derivative liability (20,687) (11,641)
Long-term derivative liability (43,267) (36,604)
Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Short-term derivative asset 12,422 27,146
Long-term derivative asset 652 322
Short-term derivative liability (20,687) (11,641)
Long-term derivative liability (43,267) (36,604)
Total net (liability) asset derivative position $ (50,880) $ (20,777)