CRUDE OIL AND NATURAL GAS PROPERTIES - Summarized Unaudited Pro Forma Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
VEN Bakken, W Energy and Pivotal Acquisitions
Asset Acquisition [Line Items]
Revenues	$ 500,728	$ 879,925
Net Income	$ (95,812)	144,279
W Energy and Pivotal Acquisitions
Asset Acquisition [Line Items]
Revenues		797,847	$ 294,862
Net Income		$ 174,070	$ 283