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:	duration

- 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 amount of proven and probable coal reserves leased from the related party.

+ References

No definition available.

+ Details

Name:	ahgp_CoalReservesRightsTonnageLeasedFromRelatedParty
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:	duration

- 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

-Glossary Investing Activities

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

Reference 2: 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

+ Details

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

- 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_RelatedPartyTransactionsByRelatedPartyAxis=ahgp_WKYCoalPlayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

WKY COALPLAY (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	1 Months Ended
	Feb. 03, 2015 T	Feb. 28, 2015 T	Dec. 31, 2014 item
WKY CoalPlay \| Acquisition of coal reserves from a subsidiary of Patriot
Related Party Transaction
Coal reserves, rights purchased (in tons)	39,100,000	39,100,000
Purchase price (in dollars)	$ 25.0	$ 25.0
WKY CoalPlay
Related Party Transaction
Number of options to acquire leased reserves granted during period			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		2.1
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		$ 2.1
Coal reserves leased from related party (in tons)	39,100,000