The minimum amount of royalties to be paid annually to the related party, per the terms of the agreement.

No definition available.

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

- 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

Carrying amount as of the balance sheet date of capitalized amounts paid for mineral royalties.

+ References

No definition available.

+ Details

Name:	ahgp_PrepaidMineralRoyaltiesCurrentAndNoncurrent
Namespace Prefix:	ahgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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=56944662&loc=d3e3536-108585

+ Details

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

- 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:

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=ahgp_CoalLeaseFebruary2015HendersonAndUnionCountiesKentuckyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=ahgp_CoalLeaseDecember2014HendersonAndUnionCountiesKentuckyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=ahgp_CoalLeaseDecember2014WebsterCountyKentuckyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=ahgp_CoalLeaseDecember2014HendersonCountyKentuckyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

RELATED-PARTY TRANSACTIONS - WKY CoalPlay (Details) - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Feb. 28, 2015	Jan. 31, 2015	Dec. 31, 2014	Dec. 31, 2015
Related Party Transaction
Advance royalties			$ 25,311	$ 28,115
WKY CoalPlay \| Coal lease \| Variable Interest Entity, Not Primary Beneficiary
Related Party Transaction
Advance royalties				$ 10,800
WKY CoalPlay \| February 2015 coal lease - Henderson and Union Counties, Kentucky \| Variable Interest Entity, Not Primary Beneficiary
Related Party Transaction
Initial term of lease	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
WKY CoalPlay \| December 2014 coal lease - Henderson and Union Counties, Kentucky \| Variable Interest Entity, Not Primary Beneficiary
Related Party Transaction
Initial term of lease			20 years
Percentage of earned royalty on coal sale price				4.00%
Annual minimum royalties				$ 3,600
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		$ 3,600
WKY CoalPlay \| December 2014 coal lease - Webster County, Kentucky \| Variable Interest Entity, Not Primary Beneficiary
Related Party Transaction
Initial term of lease			7 years
Percentage of earned royalty on coal sale price				4.00%
Annual minimum royalties				$ 2,600
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		2,600
WKY CoalPlay \| December 2014 coal lease - Henderson County, Kentucky \| Variable Interest Entity, Not Primary Beneficiary
Related Party Transaction
Initial term of lease			20 years
Percentage of earned royalty on coal sale price				4.00%
Annual minimum royalties				$ 2,500
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		$ 2,500