LONG-TERM DEFERRED REVENUE LIABILITIES AND OTHER LONG-TERM LIABILITIES - Narrative (Details) $ in Thousands			3 Months Ended
	Jul. 31, 2019 USD ($)	May 21, 2018 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 11, 2019 USD ($) bbl	Jul. 31, 2018 well mi
Long-term Purchase Commitment [Line Items]
Deferred revenue		$ 35,000
Deferred revenue recognized			$ 0	$ 11,700
Contract with customer, term		12 years
Salt Creek Midstream Water, LLC
Long-term Purchase Commitment [Line Items]
Number of miles of pipeline (in miles) | mi						14
Number of wells (in wells) | well						1
Prefunded drilling bonus					$ 2,500
Crude oil takeaway, target number of barrels per day (in barrels per day) | bbl					40,000
Deferred revenue					$ 2,500
Deferred revenue recognized			100
Winkler Lea Transactions
Long-term Purchase Commitment [Line Items]
Proceeds from sale of overriding royalty interests and non-operated working interests	$ 39,000
Net revenue payments on financing arrangement			$ 1,594