XML 62 R50.htm IDEA: XBRL DOCUMENT v3.10.0.1

DERIVATIVE AND HEDGING ACTIVITIES - Number of Contracts (Details) - Derivatives not designated as hedging contracts - Commodity contracts - item	Sep. 30, 2018	Dec. 31, 2017
Derivative and hedging activities
Number of open commodity derivative contracts	85	34
Collars | Natural gas
Derivative and hedging activities
Number of open commodity derivative contracts	8	3
Collars | Crude oil
Derivative and hedging activities
Number of open commodity derivative contracts	31	19
Basis Swap | Natural gas
Derivative and hedging activities
Number of open commodity derivative contracts	7
Basis Swap | Natural gas liquids
Derivative and hedging activities
Number of open commodity derivative contracts	8
Basis Swap | Crude oil
Derivative and hedging activities
Number of open commodity derivative contracts	25	12
Put options | Crude oil
Derivative and hedging activities
Number of open commodity derivative contracts	2
Call option | Crude oil
Derivative and hedging activities
Number of open commodity derivative contracts	3
WTI NYMEX Roll | Crude oil
Derivative and hedging activities
Number of open commodity derivative contracts	1

X

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

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

X

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=hk_CollarsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=us-gaap_NaturalGasReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=us-gaap_CrudeOilMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_BasisSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=us-gaap_NaturalGasLiquidsReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_PutOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CallOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=hk_WtiSwapsMarketsNymexMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: