The minimum amount of royalties to be paid annually.

No definition available.

Name:	ahgp_AnnualMinimumRoyalties
Namespace Prefix:	ahgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the approximate amount of proven and probable coal reserves for which the rights were purchased in the transaction.

+ References

No definition available.

+ Details

Name:	ahgp_CoalReservesRightsPurchasedApproximateTonnage
Namespace Prefix:	ahgp_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of options granted to the entity during the period to acquire coal reserves under lease agreements.

+ References

No definition available.

+ Details

Name:	ahgp_OptionsToAcquireLeasedReservesGrantedDuringPeriod
Namespace Prefix:	ahgp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of earned royalty on the coal sales price provided to the counterparty under the lease agreement.

+ References

No definition available.

+ Details

Name:	ahgp_PercentageOfEarnedRoyaltyOnCoalSalePrice
Namespace Prefix:	ahgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of internal rate of return provided to the counterparty in the purchase price under the option to acquire the leased coal reserves.

+ References

No definition available.

+ Details

Name:	ahgp_PercentageOfInternalRateOfReturnOnPurchasePriceIfLeasedReservesAcquired
Namespace Prefix:	ahgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period within which the entity has the option to acquire the coal reserves under the lease agreement.

+ References

No definition available.

+ Details

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

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash paid for royalties during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForRoyalties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow from the acquisition of a mineral right which is the right to extract a mineral from the earth or to receive payment, in the form of royalty, for the extraction of minerals.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

+ Details

Name:	us-gaap_PaymentsToAcquireMineralRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of capitalized amounts paid for mineral royalties which will be charged against earnings after one year or beyond the normal operating cycle, if longer.

+ 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 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

+ Details

Name:	us-gaap_PrepaidMineralRoyaltiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

- Details

Name:	dei_LegalEntityAxis=ahgp_WKYCoalPlayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis=ahgp_CoalReserveAcquisitionPatriotCoalCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ahgp_WKYCoalPlayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=ahgp_CoalLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

WKY COALPLAY (Details) $ in Thousands, T in Millions		1 Months Ended
WKY COALPLAY (Details) $ in Thousands, T in Millions	Feb. 03, 2015 USD ($) T	Feb. 28, 2015 USD ($) T	Dec. 31, 2014 USD ($) item	Jun. 30, 2015 USD ($)
Related Party Transaction
Advance royalties			$ 15,895	$ 24,901
WKY CoalPlay \| Acquisition of coal reserves from a subsidiary of Patriot
Related Party Transaction
Coal reserves, rights purchased (in tons) \| T	39.1	39.1
Purchase price (in dollars)	$ 25,000	$ 25,000
WKY CoalPlay
Related Party Transaction
Advance royalties				$ 10,800
Number of options to acquire leased reserves granted during period \| item			2
WKY CoalPlay \| Coal lease \| Acquisition of coal reserves from a subsidiary of Patriot
Related Party Transaction
Lease agreement term		20 years
Percentage of earned royalty on coal sale price		4.00%
Annual minimum royalties		$ 2,100
Term to acquire the leased reserves		3 years
Percentage of internal rate of return on purchase price, if leased reserves acquired		7.00%
Payments for royalties		$ 2,100