NONCONTROLLING INTERESTS (Details 2)	Mar. 31, 2014
ARLP
Noncontrolling Interest
Units owned by parent	15,544,169
ARLP \| SGP
Noncontrolling Interest
Ownership percentage by noncontrolling owners	0.01%
Intermediate Partnership \| SGP
Noncontrolling Interest
Ownership percentage by noncontrolling owners	0.01%

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant