Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Narrative (Details)

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DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Narrative (Details) - Total Open Commodity Swaps
bbl in Millions
9 Months Ended
Sep. 30, 2019
$ / bbl
bbl
Derivative [Line Items]  
Volume (in barrels) | bbl 19.0
Weighted average price (in dollars per barrel) | $ / bbl 57.32