LONG-TERM DEBT - ARLP Debt Arrangements and Securitization Facility (Details) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)
ARLP Debt Arrangements
Long-Term Debt
ARLP debt arrangements requirements, period over which the ratios are required to be maintained	1 year
Actual debt to cash flow ratio for trailing twelve months		1.37
Actual cash flow to interest expense ratio for trailing twelve months		22.7
ARLP Debt Arrangements \| Maximum
Long-Term Debt
ARLP debt arrangements requirements, debt to cash flow ratio	3.0
ARLP Debt Arrangements \| Minimum
Long-Term Debt
ARLP debt arrangements requirements, cash flow to interest expense ratio	3.0
ARLP Revolving Credit Facility
Long-Term Debt
Revolving credit facility	$ 700.0	$ 700.0
Letters of credit outstanding	5.9	5.9
Line of credit facility, available for borrowing	$ 244.1	244.1
Frequency of commitment fee on undrawn portion	annual
Annual commitment fee percentage, undrawn portion	0.25%
ARLP Securitization facility
Long-Term Debt
Revolving credit facility	$ 100.0	$ 100.0

Represents the ratio of cash flow to interest expense.

No definition available.

Name:	ahgp_CashFlowToInterestExpenseRatioActual
Namespace Prefix:	ahgp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period over which the ratios required under the terms of the debt agreement are calculated.

+ References

No definition available.

+ Details

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Namespace Prefix:	ahgp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the cash flow to interest expense ratio required under the terms of the debt agreement.

+ References

No definition available.

+ Details

Name:	ahgp_DebtInstrumentCovenantsCashFlowToInterestExpenseRatio
Namespace Prefix:	ahgp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the debt to cash flow ratio required under the terms of the debt agreement.

+ References

No definition available.

+ Details

Name:	ahgp_DebtInstrumentCovenantsDebtToCashFlowRatio
Namespace Prefix:	ahgp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the ratio of debt to cash flow.

+ References

No definition available.

+ Details

Name:	ahgp_DebtToCashFlowRatioActual
Namespace Prefix:	ahgp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of when the fee for available but unused credit capacity is required to be paid (for example, annually, quarterly, or monthly).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
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- Details

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

Name:	us-gaap_DebtInstrumentAxis=ahgp_AllianceResourcePartnersLpRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_DebtInstrumentAxis=ahgp_AllianceResourcePartnersLpSecuritizationFacilityMember
Namespace Prefix:
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