SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Advance Royalties (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Advance Royalties
Allowance against royalty prepayments	$ 6,100	$ 6,200
Advance royalties, affiliates (see Note 18 - Related Party Transactions)	32,993	19,820
Advance royalties, third-parties	11,177	10,759
Total advance royalties, net	$ 44,170	$ 30,579

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

No definition available.

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