COMMITMENTS AND CONTINGENCIES - NARRATIVE (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018 bbl	Dec. 31, 2017 USD ($) bbl
Long-term Purchase Commitment [Line Items]
Anticipated costs in 2018	$ 12,923
Minimum compliance term	7 years
Optional extended term	3 years
Minimum differential fee	$ 155,994
Crude Oil
Long-term Purchase Commitment [Line Items]
Average minimum purchase commitment, volume required (in bbl) | bbl									0
Minimum differential fee	151,000
Scenario, Forecast | Crude Oil
Long-term Purchase Commitment [Line Items]
Average minimum purchase commitment, volume required (in bbl) | bbl								10,100
Purchase commitment, volume required annual increase		3.00%	3.00%	3.00%	3.00%	3.00%	41.00%
Maximum volume requirement | bbl								16,000
CDPHE
Long-term Purchase Commitment [Line Items]
Administrative penalty paid									$ 200
COC costs incurred									$ 700
Anticipated costs in 2018	3,500
Anticipated costs in 2019 through 2022	$ 3,100
Minimum compliance term	4 years