Current Ratio Requirement

No definition available.

Name:	dnr_CurrentRatioRequirement
Namespace Prefix:	dnr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum permitted consolidated EBITDAX to Consolidated Interest charges ratio.

+ References

No definition available.

+ Details

Name:	dnr_EBITDAXtoConsolidatedInterest
Namespace Prefix:	dnr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest in entities which guarantee our debt issuances, expressed as a percentage

+ References

No definition available.

+ Details

Name:	dnr_InterestInGuarantorSubsidiaries
Namespace Prefix:	dnr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum permitted Senior Secured Debt to consolidated EBITDAX ratio.

+ References

No definition available.

+ Details

Name:	dnr_SeniorSecuredDebttoEBITDAX
Namespace Prefix:	dnr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum permitted total debt to consolidated EBITDAX.

+ References

No definition available.

+ Details

Name:	dnr_TotalDebttoConsolidatedEBITDAX
Namespace Prefix:	dnr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

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

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

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

- References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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=6877327&loc=d3e13212-122682

+ Details

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

- 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

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dnr_CovenantByYearAxis=dnr_Year2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dnr_CovenantByPeriodAxis=dnr_Q1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dnr_CovenantByYearAxis=dnr_Year2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dnr_CovenantByPeriodAxis=dnr_Q2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dnr_CovenantByPeriodAxis=dnr_Q3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt (Details Textuals)	1 Months Ended	3 Months Ended
Long-Term Debt (Details Textuals)	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	May 13, 2020 USD ($)
Senior Secured Bank Credit Facility [Abstract]
Interest in guarantor subsidiaries	100.00%	100.00%
Credit facility, unused capacity - commitment fee percentage		0.50%
Senior secured debt to consolidated EBITDAX		2.5
Consolidated EBITDAX to consolidated interest charges		1.25
Current ratio requirement		1.0
Debt repurchases, face amount	$ 30,200,000	$ 30,200,000
Cash paid for debt repurchases	14,200,000	14,171,000	$ 0
Gain on debt extinguishment	$ 19,000,000.0	$ 18,994,000	$ 0
Subsequent Event
Senior Secured Bank Credit Facility [Abstract]
Borrowing base				$ 615,000,000
Lender commitments				$ 615,000,000
Year 2020
Senior Secured Bank Credit Facility [Abstract]
Total Debt to Consolidated EBITDAX		5.25
Q1 \| Year 2021
Senior Secured Bank Credit Facility [Abstract]
Total Debt to Consolidated EBITDAX		4.50
Q2 \| Year 2021
Senior Secured Bank Credit Facility [Abstract]
Total Debt to Consolidated EBITDAX		4.5
Q3 \| Year 2021
Senior Secured Bank Credit Facility [Abstract]
Total Debt to Consolidated EBITDAX		4.5