ACCRUED EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Payables and Accruals [Abstract]
Insurance	$ 48,243	$ 21,712
Interest	20,061	15,434
Accrued disposal costs	1,835	2,455
Accrued compensation and benefits	70,250	56,029
Income, real estate, sales and other taxes	35,640	14,863
Other	56,400	37,499
Total accrued expenses	$ 232,429	$ 147,992