v3.5.0.2

Derivative Instruments and Fair Value Measurements - Outstanding Commodity Derivatives Volumes and Prices (Detail)	6 Months Ended
	Jun. 30, 2016 MMBTU $ / bbl $ / MMBTU bbl
Crude Oil July 2016 - December 2016 Contract One [Member] | Swap [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | bbl	500
Contract Price | $ / bbl	62.50
Crude Oil July 2016 - December 2016 Contract Two [Member] | Swap [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | bbl	250
Contract Price | $ / bbl	62.55
Crude Oil July 2016 - September 2016 Contract [Member] | Swap [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | bbl	750
Contract Price | $ / bbl	43.00
Natural Gas July 2016 - December 2016 Contract One [Member] | Swap [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | MMBTU	100,000
Contract Price	2.91
Natural Gas July 2016 - December 2016 Contract Two [Member] | Swap [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | MMBTU	100,000
Contract Price	2.95
Natural Gas July 2016 - March 2017 Contract One [Member] | Swap [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | MMBTU	100,000
Contract Price	2.463
Natural Gas July 2016 - March 2017 Contract Two [Member] | Swap [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | MMBTU	300,000
Contract Price	2.45
Natural Gas April 2017 - December 2017 Contract [Member] | Collar [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | MMBTU	200,000
Natural Gas April 2017 - December 2017 Contract [Member] | Collar [Member] | Minimum [Member]
Derivatives Fair Value [Line Items]
Contract Price	2.30
Natural Gas April 2017 - December 2017 Contract [Member] | Collar [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Contract Price	2.60
Natural Gas November 2016 - March 2017 Contract [Member] | Swap [Member]
Derivatives Fair Value [Line Items]
Volume Transacted | MMBTU	200,000
Contract Price	3.287

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_CrudeOilJulyTwoZeroOneSixToDecemberTwoZeroOneSixContractOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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