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

The amount of quarterly principal payments to be made for a specified initial period following commencement of principal balance repayment.

No definition available.

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

Period following the commencement of principal balance repayment, for which the initial quarterly payment amount applies.

No definition available.

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

The amount of quarterly principal payments to be made after a specified initial period following commencement of principal balance repayment.

No definition available.

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

The quarterly principal payments required upon commencement of principal balance repayment, as a percent of the borrower's excess cash flow as defined in the debt agreement.

No definition available.

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

Represents the number of banks providing letters of credit to the entity.

No definition available.

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

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.

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

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

No definition available.

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

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.

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

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

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

No definition available.

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

Name:	us-gaap_DebtInstrumentAxis=ahgp_CavalierMineralsCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: