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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	28. Subsequent Events During February 2016, the Partnership continued de-levering its balance sheet and redeemed $22.0 million of outstanding Partnership Notes for $12.7 million on the open market. Subsequent to December 31, 2015, the Company issued a $5.0 million letter of credit as collateral to one of its surety providers in connection with black lung and other financial guarantee obligations. Also, the Company issued an $18.0 million letter of credit as collateral to surety providers in connection with certain contractual obligations, including certain reclamation obligations primarily related to our coal mining operations. These letters of credit lower our borrowing availability under our credit facilities.