Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
DERIVATIVE INSTRUMENTS (Derivative Instruments in Financial Position) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Short-term derivative asset $ 6,245 $ 126,201
Long-term derivative asset 1,098 563
Short-term derivative liability (24,164) (303)
Long-term derivative liability (63,803) (53,135)
Total net (liability) asset derivative position (80,624) 73,326
Commodity Contracts    
Derivatives, Fair Value [Line Items]    
Short-term derivative asset 6,245 125,383
Long-term derivative asset 1,098 0
Short-term derivative liability (24,164) (303)
Long-term derivative liability (63,803) (53,135)
Total net (liability) asset derivative position (80,624) 71,945
Contingent consideration arrangement    
Derivatives, Fair Value [Line Items]    
Short-term derivative asset   818
Long-term derivative asset 0 563
Total contingent consideration derivative position $ 0 $ 1,381