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ACQUISITIONS (Details) (Alliance Resource Properties, Acquisition of coal reserves from Laurel Run Mining Company, USD $) In Millions, unless otherwise specified	1 Months Ended
	Jun. 30, 2013 T
Alliance Resource Properties \| Acquisition of coal reserves from Laurel Run Mining Company
Asset Acquisition
Proven and probable coal reserves (in tons)	11,600,000
Additional coal resources (in tons)	5,900,000
Purchase price	$ 25.2

- Definition

The cash outflow from the acquisition of a mineral right which is the right to extract a mineral from the earth or to receive payment, in the form of royalty, for the extraction of minerals.

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