DERIVATIVE FINANCIAL INSTRUMENTS - Derivative Positions (Details)	3 Months Ended
	Jun. 30, 2020 MMBTU $ / MMBTU	Mar. 31, 2020 MMBTU $ / MMBTU $ / bbl bbl
Propane | 2020
Derivative
Volumes (Bbl) | bbl		190,000
Weighted Average Price per Bbl, MMBtu		0.70
WTI - HOU | 2020
Derivative
Volumes (Bbl) | bbl		540,000
Weighted Average Price per Bbl, MMBtu		2.98
WTI - HOU | 2021
Derivative
Volumes (Bbl) | bbl		120,000
Weighted Average Price per Bbl, MMBtu		2.53
Swaps | WTI | 2020
Derivative
Volumes (Bbl) | bbl		1,485,000
Weighted Average Price per Bbl, MMBtu		53.27
Swaps | WTI | 2021
Derivative
Volumes (Bbl) | bbl		2,196,000
Weighted Average Price per Bbl, MMBtu		49.01
Swaps | HH | 2020
Derivative
Volumes (MMBtu) | MMBTU		900,000
Weighted Average Price per Bbl, MMBtu | $ / MMBTU		2.68
Swaps | HH | 2021
Derivative
Volumes (MMBtu) | MMBTU		1,050,000
Weighted Average Price per Bbl, MMBtu | $ / MMBTU		2.69
Swaps | HH | 2021 | Subsequent event
Derivative
Volumes (MMBtu) | MMBTU	600,000
Weighted Average Price per Bbl, MMBtu | $ / MMBTU	2.67
Swaps | HH | 2022
Derivative
Volumes (MMBtu) | MMBTU		720,000
Weighted Average Price per Bbl, MMBtu | $ / MMBTU		2.76
Swaps | HSC | 2020
Derivative
Volumes (MMBtu) | MMBTU		90,000.00
Weighted Average Price per Bbl, MMBtu | $ / MMBTU		2.53
Swaps | HSC | 2021
Derivative
Volumes (MMBtu) | MMBTU		240,000.00
Weighted Average Price per Bbl, MMBtu | $ / MMBTU		2.50
Swaps | HSC | 2022
Derivative
Volumes (MMBtu) | MMBTU		360,000.00
Weighted Average Price per Bbl, MMBtu | $ / MMBTU		2.54
Swaps | HSC | 2023
Derivative
Volumes (MMBtu) | MMBTU		240,000.00
Weighted Average Price per Bbl, MMBtu | $ / MMBTU		2.64
Collars [Member] | WTI | 2020
Derivative
Volumes (Bbl) | bbl		453,000
Weighted Average Price per Bbl, MMBtu - Floor		55.19
Weighted Average Price per Bbl, MMBtu - Ceiling		62.08
Collars [Member] | WTI | 2021
Derivative
Volumes (Bbl) | bbl		216,000
Weighted Average Price per Bbl, MMBtu - Floor		45.00
Weighted Average Price per Bbl, MMBtu - Ceiling		65.00
Collars [Member] | WTI | 2022
Derivative
Volumes (Bbl) | bbl		228,000
Weighted Average Price per Bbl, MMBtu - Floor		40.00
Weighted Average Price per Bbl, MMBtu - Ceiling		66.00
Collars [Member] | WTI | 2023
Derivative
Volumes (Bbl) | bbl		160,000
Weighted Average Price per Bbl, MMBtu - Floor		40.00
Weighted Average Price per Bbl, MMBtu - Ceiling		63.10
Collars [Member] | HH | 2020
Derivative
Volumes (MMBtu) | MMBTU		60,000
Weighted Average Price per Bbl, MMBtu - Floor | $ / MMBTU		2.50
Weighted Average Price per Bbl, MMBtu - Ceiling | $ / MMBTU		2.95
Collars [Member] | HSC | 2020
Derivative
Volumes (MMBtu) | MMBTU		48,000
Weighted Average Price per Bbl, MMBtu - Floor | $ / MMBTU		2.60
Weighted Average Price per Bbl, MMBtu - Ceiling | $ / MMBTU		2.91
Three-Way Collars | WTI | 2020
Derivative
Volumes (Bbl) | bbl		243,000
Weighted Average Price per Bbl, MMBtu - Ceiling		59.38
Three-Way Collars | WTI | 2021
Derivative
Volumes (Bbl) | bbl		300,000
Weighted Average Price per Bbl, MMBtu - Ceiling		57.50
Three-Way Collars | WTI | 2022
Derivative
Volumes (Bbl) | bbl		300,000
Weighted Average Price per Bbl, MMBtu - Ceiling		56.90
Three-Way Collars | WTI | Purchased | 2020
Derivative
Weighted Average Price per Bbl, MMBtu - Floor		50.37
Three-Way Collars | WTI | Purchased | 2021
Derivative
Weighted Average Price per Bbl, MMBtu - Floor		50.00
Three-Way Collars | WTI | Purchased | 2022
Derivative
Weighted Average Price per Bbl, MMBtu - Floor		50.00
Three-Way Collars | WTI | Sold | 2020
Derivative
Weighted Average Price per Bbl, MMBtu - Floor		34.63
Three-Way Collars | WTI | Sold | 2021
Derivative
Weighted Average Price per Bbl, MMBtu - Floor		35.00
Three-Way Collars | WTI | Sold | 2022
Derivative
Weighted Average Price per Bbl, MMBtu - Floor		35.00