Oil and gas commitments and contracts term.

No definition available.

Name:	este_OilAndGasCommitmentsAndContractsTerm
Namespace Prefix:	este_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Oil and natural gas properties.

+ References

No definition available.

+ Details

Name:	este_OilAndNaturalGasPropertiesLineItems
Namespace Prefix:	este_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: 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=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

+ Details

Name:	us-gaap_AssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The noncash expense charged against earnings to recognize the consumption of oil and gas reserves that are part of an entities' assets.

+ References

+ Details

Name:	us-gaap_DepletionOfOilAndGasProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

Reference 2: 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=121586364&loc=d3e3602-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 360
-Section 35
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66906256&loc=d3e66150-109466

+ Details

Name:	us-gaap_ImpairmentOfOilAndGasProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=este_ProvedOilAndNaturalGasPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=este_EagleFordTrendMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=este_UnprovedOilAndGasPropertiesMember
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:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=este_OilandGasPropertiesSubjecttoAcreageExpirationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Oil and Natural Gas Properties (Details) - USD ($)	3 Months Ended			6 Months Ended
Oil and Natural Gas Properties (Details) - USD ($)	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Oil And Natural Gas Properties [Line Items]
Impairment of proved and unproved oil and gas properties				$ 42,813,000	$ 0
Impairment expense	$ 62,000		$ 0	60,433,000	0
Proved Oil and Natural Gas Properties
Oil And Natural Gas Properties [Line Items]
Depletion expenses	22,800,000		$ 14,000,000.0	47,300,000	$ 27,800,000
Impairment of proved and unproved oil and gas properties	0			25,252,000
Proved Oil and Natural Gas Properties \| Eagle Ford Trend
Oil And Natural Gas Properties [Line Items]
Impairment of proved and unproved oil and gas properties	0	$ 25,300,000
Unproved Oil and Gas Properties
Oil And Natural Gas Properties [Line Items]
Impairment of proved and unproved oil and gas properties	62,000			$ 17,561,000
Unproved Oil and Gas Properties \| Minimum
Oil And Natural Gas Properties [Line Items]
Unproved oil and gas lease term				3 years
Unproved Oil and Gas Properties \| Maximum
Oil And Natural Gas Properties [Line Items]
Unproved oil and gas lease term				5 years
Unproved Oil and Gas Properties \| Eagle Ford Trend
Oil And Natural Gas Properties [Line Items]
Impairment of proved and unproved oil and gas properties	0	$ 11,300,000
Oil and Gas Properties, Subject to Acreage Expirations
Oil And Natural Gas Properties [Line Items]
Impairment of proved and unproved oil and gas properties	$ 100,000			$ 6,200,000