DEBT - Credit Agreement - Wells Fargo (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Total long-term debt	$ 424,000,000	$ 0	[1]
Rattler Credit Facility
Line of Credit Facility [Line Items]
Operating Company revolving credit facility	424,000,000	$ 0
Revolving credit facility maximum borrowing capacity	600,000,000.0
Available borrowings capacity	$ 176,000,000.0
Rattler Credit Facility | Minimum
Line of Credit Facility [Line Items]
Commitment fee on the unused portion of the borrowing base	0.25%
Rattler Credit Facility | Minimum | Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.25%
Rattler Credit Facility | Minimum | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%
Rattler Credit Facility | Maximum
Line of Credit Facility [Line Items]
Commitment fee on the unused portion of the borrowing base	0.375%
Rattler Credit Facility | Maximum | Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%
Rattler Credit Facility | Maximum | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.25%

[1] See Note 1 for information regarding the basis of financial statement presentation.