ASSET IMPAIRMENT CHARGE (Details) (USD $)	3 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended
Sep. 30, 2012	Dec. 31, 2012	Aug. 23, 2012 Pontiki mining complex Central Appalachia item	Sep. 30, 2012 Pontiki mining complex Central Appalachia
Asset impairment charges
Number of clean coal stacking tubes with belt line failure			2
Asset impairment charge	$ 19,000,000	$ 19,031,000		$ 19,000,000
Property plant and equipment, Fair value				$ 16,100,000

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 45, 46, 47

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

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-Name Accounting Standards Codification

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