Revenue interest acquired in a purchase of oil and natural gas properties.

No definition available.

Name:	den_RevenueInterestAcquiredInPurchaseOfOilAndNaturalGasProperties
Namespace Prefix:	den_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Approximate working interest acquired in a purchase of oil and natural gas properties.

+ References

No definition available.

+ Details

Name:	den_WorkingInterestAcquiredInPurchaseOfOilAndNaturalGasProperties
Namespace Prefix:	den_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sales price per unit of oil and gas produced.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1204
-Paragraph (b)
-Subparagraph (1)

+ Details

Name:	srt_AverageSalesPrices
Namespace Prefix:	srt_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionContingentConsiderationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

+ Details

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

- Definition

The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties 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

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

- Details

Name:	us-gaap_ContingentConsiderationByTypeAxis=den_Year2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ContingentConsiderationByTypeAxis=den_Year2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Acquisition (Details Textuals) $ in Thousands		3 Months Ended
Acquisition (Details Textuals) $ in Thousands	Mar. 03, 2021 USD ($)	Mar. 31, 2021 USD ($) $ / Barrel	Mar. 31, 2020 USD ($)
Business Acquisition, Contingent Consideration [Line Items]
Approximate working interest percentage acquired	100.00%
Approximate net revenue interest percentage acquired	83.00%
Acquisitions of oil and natural gas properties	$ 10,700	$ 10,665	$ 42
2021
Business Acquisition, Contingent Consideration [Line Items]
Contingent cash payment		$ 4,000
2021 \| Minimum
Business Acquisition, Contingent Consideration [Line Items]
Average price \| $ / Barrel		50
2022
Business Acquisition, Contingent Consideration [Line Items]
Contingent cash payment		$ 4,000
2022 \| Minimum
Business Acquisition, Contingent Consideration [Line Items]
Average price \| $ / Barrel		50