COMMITMENTS AND CONTINGENCIES (Details 3) (Property and casualty insurance, USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013
Commitments And Contingencies
Aggregate maximum insurance limit	$ 100.0
Insurance deductible	1.5
Overall aggregate deductible	$ 10.0
Minimum
Commitments And Contingencies
Waiting period	90 days
Maximum
Commitments And Contingencies
Waiting period	120 days

Represents the waiting period for underground business interruptions under the commercial property insurance held by the entity.

No definition available.

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