INCOME TAXES (Sources and Tax Effects of Differences Between Benefit from Income Taxes and Amount Computed by Applying Federal Statutory Income Tax Rate to Losses from Continuing Operations before Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INCOME TAXES [Abstract]
Income tax provision (benefit) at the federal statutory tax rate of 35%	$ 114,750	$ 104,594	$ (1,296)
Statutory depletion	(27,702)	(25,774)	(20,875)
State and local income taxes, net of federal income tax benefit	5,945	15,017	(3,641)
U.S. production deduction	(5,099)	0	0
Foreign tax credit carryforwards impairment	6,486	0	0
Permanently reinvested foreign earnings	(6,396)	0	0
Other, net	6,959	(2,145)	1,353
Total provision for (benefit from) income taxes	$ 94,943	$ 91,692	$ (24,459)
Income tax benefit at the federal statutory tax rate of 35%, Rate	35.00%	35.00%	35.00%
Statutory depletion, Rate	(8.40%)	(8.60%)	563.70%
State and local income taxes, net of federal income tax benefit, Rate	1.80%	5.00%	98.30%
U.S. production deduction, Rate	(1.60%)	0.00%	0.00%
Foreign tax credit carryforwards impairment, Rate	2.00%	0.00%	0.00%
Permanently reinvested foreign earnings, Rate	(2.00%)	0.00%	0.00%
Other, net, Rate	2.20%	(0.70%)	(36.50%)
Total Effective tax rate	29.00%	30.70%	660.50%