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ACQUISITIONS & DIVESTITURES - NARRATIVE (Details)		1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 01, 2021 USD ($) number $ / shares shares	Nov. 30, 2021 $ / shares	Sep. 30, 2021 USD ($) $ / shares	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) $ / shares	Sep. 30, 2020 USD ($)	Dec. 31, 2020 $ / shares
Business Acquisition [Line Items]
Common stock, par value (in dollars per share) | $ / shares			$ 0.01		$ 0.01		$ 0.01
Merger transaction costs			$ 5,580,000	$ 888,000	$ 27,121,000	$ 909,000
HighPoint Merger
Business Acquisition [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.01
Exchange ratio (in shares) | shares	0.11464
Common stock, shares issued (in shares) | shares	9,802,000
Aggregate principal amount	$ 100,000,000
Net operating loss obtained	$ 170,600,000
HighPoint Merger | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow
Business Acquisition [Line Items]
Proved oil and gas properties, measurement input | number	0.13
HighPoint Merger | Former HighPoint Stockholders
Business Acquisition [Line Items]
Common stock, shares issued (in shares) | shares	487,952
HighPoint Merger | Shares of Bonanza Creek Common Stock
Business Acquisition [Line Items]
Common stock, shares issued (in shares) | shares	9,314,214
HighPoint Merger | Senior Notes | Senior Notes Due 2026, 7.50%
Business Acquisition [Line Items]
Aggregate principal amount of Bonanza Creek 7.5% Senior Notes	$ 100,000,000
Interest rate	7.50%
HighPoint Merger | HighPoint Merger
Business Acquisition [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.001
HighPoint Merger | HighPoint Operating Company | Senior Notes | Senior Notes Due 2022 and Senior Notes Due 2025
Business Acquisition [Line Items]
Aggregate principal amount of Bonanza Creek 7.5% Senior Notes	$ 625,000,000
HighPoint Merger | HighPoint Operating Company | Senior Notes | Senior Notes Due 2022
Business Acquisition [Line Items]
Interest rate	7.00%
HighPoint Merger | HighPoint Operating Company | Senior Notes | Senior Notes Due 2025
Business Acquisition [Line Items]
Interest rate	8.75%
XOG Merger | Scenario, Forecast
Business Acquisition [Line Items]
Annual dividend payments (in dollars per share) | $ / shares		$ 1.60
Crestone Peak Merger | Scenario, Forecast
Business Acquisition [Line Items]
Annual dividend payments (in dollars per share) | $ / shares		$ 1.85
HighPoint Merger, XOG Merger, and Crestone Peak Merger
Business Acquisition [Line Items]
Merger transaction costs			$ 5,600,000		$ 27,100,000

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