ACCRUED EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accrued Expenses [ABSTRACT]
Insurance	$ 54,671	$ 48,243
Interest	20,734	20,061
Accrued disposal costs	1,668	1,835
Accrued compensation and benefits	64,205	70,250
Income, real estate, sales and other taxes	44,307	35,640
Other	56,777	56,400
Total accrued expenses	$ 242,362	$ 232,429