Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 15, 2015	Dec. 31, 2014
Accrued Expenses and Other Current Liabilities [Abstract]
Payroll and employee benefits	$ 58,423		$ 73,362
Taxes other than income taxes	104,755		114,598
Interest	119,785	$ 90,000	30,384
Acquired sales contracts	3,852		12,453
Workers’ compensation	16,875		16,714
Asset retirement obligations	13,795		19,222
Other	11,965		35,663
Accrued Liabilities, Current	$ 329,450		$ 302,396