Asset Impairment (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	May. 02, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges		$ 2,897,928	$ 23,043	$ 2,897,928	$ 23,043
Proceeds from sale of property, plant and equipment				$ 1,706	$ 0
BCCT
Impaired Long-Lived Assets Held and Used [Line Items]
Proceeds from sale of property, plant and equipment	$ 25,000
Impairment charge recognized			$ 23,000
Mining Properties and Mineral Rights
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges		2,400,000
Mining Properties and Mineral Rights
Impaired Long-Lived Assets Held and Used [Line Items]
Asset Impairment Charges		$ 508,500