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

No definition available.

Name:	ahgp_PrepaidMineralRoyaltiesCurrentAndNoncurrent
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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

No definition available.

Name:	ahgp_PrepaidMineralRoyaltiesCurrentAndNoncurrentAffiliates
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Data Type:	xbrli:monetaryItemType
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Carrying amount as of the balance sheet date of capitalized amounts paid to third parties for mineral royalties.

No definition available.

Name:	ahgp_PrepaidMineralRoyaltiesCurrentAndNoncurrentThirdParties
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Data Type:	xbrli:monetaryItemType
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Name:	us-gaap_AdvanceRoyaltiesAbstract
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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.4)

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

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
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Period Type:	instant

Name:	us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract
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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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 210.5-02.12)

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

Name:	us-gaap_EquityMethodInvestments
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Data Type:	xbrli:monetaryItemType
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Name:	us-gaap_RevenueRecognitionAbstract
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