SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investments (Details)	12 Months Ended
Dec. 31, 2017 instrument
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Number of investments using HBLV to allocate equity in earnings or losses	0

The number of equity method investments accounted for using the hypothetical liquidation at book value ("HLBV") method of accounting.

No definition available.

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