PARTNERS' CAPITAL AND DISTRIBUTIONS (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended				0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 LP Units	Sep. 30, 2012 LP Units	Nov. 19, 2013 LP Units Subsequent Event	Nov. 12, 2013 LP Units Subsequent Event	Nov. 02, 2013 LP Units Subsequent Event
Distributions
Actual cash distributions	$ 305,544	$ 278,274	$ 308,500	$ 282,100	$ 124,000
Distribution declaration date							Nov. 01, 2013
Cash distributions declared							$ 1.075
Equity offering, Limited Partners Capital Account (LP) units issued							8,600,000
Distribution date					Nov. 19, 2013
Distribution record date						Nov. 12, 2013