v3.8.0.1

PROPERTY, PLANT AND EQUIPMENT - Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment
Property, plant and equipment, at cost	$ 2,934,188	$ 2,920,988
Less accumulated depreciation, depletion and amortization	(1,457,532)	(1,335,145)
Total property, plant and equipment, net	1,476,656	1,585,843
Mining Equipment And Processing Facilities
Property, Plant and Equipment
Property, plant and equipment, at cost	1,847,037	1,854,001
Land And Mineral Rights
Property, Plant and Equipment
Property, plant and equipment, at cost	449,152	439,236
Buildings, Office Equipment And Improvements
Property, Plant and Equipment
Property, plant and equipment, at cost	310,167	304,696
Construction and mine development in progress
Property, Plant and Equipment
Property, plant and equipment, at cost	47,223	26,025
Mine development costs
Property, Plant and Equipment
Property, plant and equipment, at cost	$ 280,609	$ 297,030

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Topic 210
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-Section S99
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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
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Alliance Holdings GP, L.P. 10-K