DERIVATIVE FINANCIAL INSTRUMENTS - Current contracts (Details) - Oil - January 2022 through December 2022	Dec. 31, 2021 BarrelOfButane $ / bbl	May 11, 2021 BarrelOfButane
Commodity Contract A
Number Of Barrels Per Day | BarrelOfButane	500
Swap Price | $ / bbl	44.22
Commodity Contract B
Number Of Barrels Per Day | BarrelOfButane	500
Swap Price | $ / bbl	44.75
Commodity Contract C
Number Of Barrels Per Day | BarrelOfButane	500
Swap Price | $ / bbl	44.97
Commodity Contract D
Number Of Barrels Per Day | BarrelOfButane	250
Swap Price | $ / bbl	45.98
Commodity Contract E
Number Of Barrels Per Day | BarrelOfButane	250
Swap Price | $ / bbl	47.00
Commodity Contract F
Number Of Barrels Per Day | BarrelOfButane	250
Swap Price | $ / bbl	50.05
Commodity Contract G
Barrels per day | BarrelOfButane		879
Swap Price | $ / bbl	49.03