ACCRUED EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accrued Expenses [ABSTRACT]
Insurance	$ 54,324	$ 48,243
Interest	17,263	20,061
Accrued disposal costs	1,668	1,835
Accrued compensation and benefits	52,055	70,250
Income, real estate, sales and other taxes	32,454	35,640
Other	54,660	56,400
Total accrued expenses	$ 212,424	$ 232,429