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LONG-TERM DEBT - Narrative (Details)				1 Months Ended	3 Months Ended		9 Months Ended
	May 01, 2022	Apr. 20, 2022 USD ($)	Oct. 13, 2021 USD ($) agency	Dec. 31, 2018	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Oct. 27, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 01, 2021 USD ($)	Apr. 01, 2021 USD ($)
LONG-TERM DEBT
Interest expense					$ 7,500,000	$ 3,700,000	$ 24,700,000	$ 7,900,000
Capitalized interest					0	$ 600,000	0	$ 1,200,000
Revolving credit facility
LONG-TERM DEBT
Minimum current ratio covenant				1.00
Amended Credit Agreement | Revolving credit facility
LONG-TERM DEBT
Maximum borrowing capacity											$ 2,000,000,000
Covenant, minimum percentage of mortgage on total value of certain proved oil and gas properties											90.00%
Maximum net leverage ratio				3.00
Borrowing base amount		$ 1,700,000,000									$ 1,000,000,000
Elected commitments		$ 1,000,000,000									$ 800,000,000
Amended Credit Agreement | Revolving credit facility | Subsequent Event
LONG-TERM DEBT
Borrowing base amount									$ 1,850,000,000
Amended Credit Agreement | Revolving credit facility | Fed Funds Effective Rate Overnight Index Swap Rate
LONG-TERM DEBT
Basis spread on variable rate		0.50%
Amended Credit Agreement | Revolving credit facility | SOFR
LONG-TERM DEBT
Basis spread on variable rate		1.00%
Basis spread on variable rate, floor		0.50%
Amended Credit Agreement | Revolving credit facility | SOFR | Minimum
LONG-TERM DEBT
Basis spread on variable rate		2.00%
Amended Credit Agreement | Revolving credit facility | SOFR | Maximum
LONG-TERM DEBT
Basis spread on variable rate		3.00%
Amended Credit Agreement | Revolving credit facility | SOFR, Plus Basis Spread One
LONG-TERM DEBT
Basis spread on variable rate, floor		1.50%
Amended Credit Agreement | Revolving credit facility | SOFR, Plus Basis Spread One | Minimum
LONG-TERM DEBT
Basis spread on variable rate		1.00%
Amended Credit Agreement | Revolving credit facility | SOFR, Plus Basis Spread One | Maximum
LONG-TERM DEBT
Basis spread on variable rate		2.00%
Amended Credit Agreement | HighPoint | Revolving credit facility
LONG-TERM DEBT
Deferred financing costs, gross					11,900,000		11,900,000
Deferred financing costs, net					6,300,000		6,300,000			$ 7,500,000
Debt issuance costs					$ 3,000,000		$ 3,000,000			$ 2,700,000
Senior Notes | Senior Notes Due 2026, 5.0%
LONG-TERM DEBT
Interest rate (as a percent)			5.00%		5.00%		5.00%			5.00%
Aggregate principal amount			$ 400,000,000		$ 400,000,000		$ 400,000,000
Covenant, investment-grade rating, number of ratings agencies (at least) | agency			2
Debt issuance costs					$ 7,103,000		$ 7,103,000			$ 8,290,000
Senior Notes | Senior Notes Due 2026, 5.0%, Indenture
LONG-TERM DEBT
Interest rate (as a percent)			5.00%
Senior Notes | Senior Notes Due 2026, 7.50% | HighPoint
LONG-TERM DEBT
Interest rate (as a percent)	7.50%				7.50%		7.50%			7.50%		7.50%
Aggregate principal amount												$ 100,000,000
Debt issuance costs										$ 0
Senior Notes | Debt Instrument, Redemption, Period One | Senior Notes Due 2026, 5.0%
LONG-TERM DEBT
Percentage of principal amount redeemed (up to)			35.00%
Redemption period, after date of closing of equity offering			180 days
Senior Notes | Debt Instrument, Redemption, Period Two | Senior Notes Due 2026, 5.0%
LONG-TERM DEBT
Redemption price, percentage			102.50%
Percentage of principal amount not redeemed			65.00%
Senior Notes | Debt Instrument, Redemption, Period Two | Senior Notes Due 2026, 7.50% | HighPoint
LONG-TERM DEBT
Redemption price, percentage	100.00%
Senior Notes | Debt Instrument, Redemption, Period Three | Senior Notes Due 2026, 5.0%
LONG-TERM DEBT
Redemption price, percentage			101.25%
Senior Notes | Debt Instrument, Redemption, Period Four | Senior Notes Due 2026, 5.0%
LONG-TERM DEBT
Redemption price, percentage			100.00%
Senior Notes | Debt Instrument, Redemption, Period Five | Senior Notes Due 2026, 5.0%
LONG-TERM DEBT
Redemption price, percentage			105.00%

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