v3.3.1.900

Derivative Instruments and Fair Value Measurements - Commodity Derivative Volumes and Prices (Detail) - Swap [Member]	12 Months Ended
	Dec. 31, 2015 MMBTU $ / MMBTU $ / bbl bbl
Natural Gas March 2016 - December 2016 Contract One [Member]
Derivatives, Fair Value [Line Items]
Volume Transacted | MMBTU	100,000
Contract Price | $ / MMBTU	2.91
Natural Gas March 2016 - December 2016 Contract Two [Member]
Derivatives, Fair Value [Line Items]
Volume Transacted | MMBTU	100,000
Contract Price | $ / MMBTU	2.95
Crude - Oil January 2016 - December 2016 Contract One [Member]
Derivatives, Fair Value [Line Items]
Volume Transacted | bbl	500
Contract Price | $ / bbl	62.50
Crude - Oil January 2016 - December 2016 Contract Two [Member]
Derivatives, Fair Value [Line Items]
Volume Transacted | bbl	250
Contract Price | $ / bbl	62.55
Crude - Oil January 2016 - June 2016 Contract One [Member]
Derivatives, Fair Value [Line Items]
Volume Transacted | bbl	500
Contract Price | $ / bbl	40.25
Crude - Oil January 2016 - June 2016 Contract Two [Member]
Derivatives, Fair Value [Line Items]
Volume Transacted | bbl	1,000
Contract Price | $ / bbl	40.00

X

- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix:	us-gaap_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix:	us-gaap_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract measured in energy volume but not the derivative contract itself.

+ References

No definition available.

+ Details

Name:	us-gaap_UnderlyingDerivativeEnergyMeasure
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

Name:	us-gaap_DerivativeByNatureAxis=us-gaap_SwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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