SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Depcreciation, Depletion, Accretion, and Amortization) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Depreciation, Depletion and Amortization [Abstract]
Depreciation	$ 271,180	$ 301,146	$ 328,072
Depletion	13,028	10,607	11,195
Accretion	10,685	7,956	8,195
Amortization of leaseholds	483	381	225
Amortization of intangible assets	11,732	11,869	14,032
Total	$ 307,108	$ 331,959	$ 361,719