Borrowing base availability requirement as required under the bank credit agreement.

No definition available.

Name:	den_BorrowingBaseAvailabilityRequirement
Namespace Prefix:	den_
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Balance Type:	na
Period Type:	instant

- Definition

Current Ratio Requirement

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Maximum permitted total Debt to consolidated EBITDAX ratio.

+ References

No definition available.

+ Details

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Namespace Prefix:	den_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow to purchase long lived physical asset use for the normal oil and gas operations and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=den_NEJDPipelineMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Period Type:

- Details

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Namespace Prefix:
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Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=den_DividendorOtherRestrictedPaymentMember
Namespace Prefix:
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Period Type:

- Details

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Long-Term Debt (Details Textuals) - USD ($)		1 Months Ended	3 Months Ended
Long-Term Debt (Details Textuals) - USD ($)	Oct. 31, 2020	Apr. 30, 2021	Mar. 31, 2021
Senior Secured Bank Credit Facility [Abstract]
Borrowing base			$ 575,000,000
Lender commitments			$ 575,000,000
Weighted average interest rate			4.00%
Commitment fee percentage			0.50%
NEJD Pipeline
Senior Secured Bank Credit Facility [Abstract]
Payments to reacquire pipeline	$ 70,000,000		$ 17,500,000
NEJD Pipeline \| Subsequent Event
Senior Secured Bank Credit Facility [Abstract]
Payments to reacquire pipeline		$ 17,500,000
Minimum
Senior Secured Bank Credit Facility [Abstract]
Current ratio requirement			1.0
Minimum \| Dividend or Other Restricted Payment
Senior Secured Bank Credit Facility [Abstract]
Borrowing base availability requirement			20.00%
Maximum
Senior Secured Bank Credit Facility [Abstract]
Consolidated total debt to consolidated EBITDAX requirement			3.5
Maximum \| Dividend or Other Restricted Payment
Senior Secured Bank Credit Facility [Abstract]
Consolidated total debt to consolidated EBITDAX requirement			2