LONG TERM DEBT - Revolving Credit Facility (Details) - Revolving Credit Facility $ in Millions		12 Months Ended
	Oct. 05, 2018	Dec. 31, 2019	Nov. 22, 2019	Nov. 01, 2019 USD ($)	Oct. 31, 2019 USD ($)
Line of Credit Facility [Line Items]
Number of days before maturity date	91 days
Current borrowing capacity				$ 800.0	$ 425.0
Covenant compliance, debt to EBITDAX ratio			3.50
Covenant compliance, current ratio			1.00
Security interests as a percent of properties		85.00%
Federal Funds
Line of Credit Facility [Line Items]
Interest rate margin in effect during period	0.50%
LIBOR
Line of Credit Facility [Line Items]
Interest rate margin in effect during period		1.00%
LIBOR | Minimum
Line of Credit Facility [Line Items]
Interest rate margin in effect during period		2.00%
LIBOR | Maximum
Line of Credit Facility [Line Items]
Interest rate margin in effect during period		3.00%
Base Rate | Minimum
Line of Credit Facility [Line Items]
Interest rate margin in effect during period		1.00%
Base Rate | Maximum
Line of Credit Facility [Line Items]
Interest rate margin in effect during period		2.00%