RELATED PARTY TRANSACTIONS Table (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Related Party Transaction [Line Items]
Expenses for payroll, employee benefit plans and unit-based compensation	$ 225,135	$ 216,380	$ 208,805
Other expenses	$ 437	$ 402	$ 383