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OIL AND NATURAL GAS PROPERTIES (Details)	9 Months Ended
	Sep. 30, 2018 $ / MMBTU $ / bbl	Sep. 30, 2017 $ / MMBTU $ / bbl
Ceiling Limitation Disclosures
First day average of the (WTI) crude oil spot price (in dollars per barrel) | $ / bbl	63.43	49.81
First day average of the Henry Hub natural gas price (in dollars per Mmbtu) | $ / MMBTU	2.91	3.00

X

- Definition

Represents the per unit first day average of the Henry Hub natural gas price for the twelve months ended as of the reporting date.

+ References

No definition available.

+ Details

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X

- Definition

Represents the per unit first day average of the West Texas Intermediate (WTI) crude oil spot price.

+ References

No definition available.

+ Details

Name:	hk_OilAndGasPricesFirstDayAverageOfTwelveMonthsOfWestTexasIntermediateSpotMarketPriceForCeilingTest
Namespace Prefix:	hk_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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