PARTNERS' CAPITAL AND DISTRIBUTIONS (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended				0 Months Ended			6 Months Ended	0 Months Ended
	Jun. 30, 2013 MMBbls	Jun. 30, 2012	Jun. 30, 2013 LP Units	Jun. 30, 2012 LP Units	Aug. 20, 2013 LP Units Subsequent Event	Aug. 12, 2013 LP Units Subsequent Event	Aug. 02, 2013 LP Units Subsequent Event	Jun. 30, 2013 Class B Units	Aug. 20, 2013 Class B Units Subsequent Event	Aug. 12, 2013 Class B Units Subsequent Event
Distributions
Actual cash distributions	$ 201,242	$ 185,449	$ 204,200	$ 188,100	$ 104,300
Distributions in-kind								349,342	146,000
Distribution declaration date							Aug. 02, 2013
Cash distributions declared							$ 1.0625
Distribution date					Aug. 20, 2013				Aug. 20, 2013
Distribution record date						Aug. 12, 2013				Aug. 12, 2013
Conversion ratio	1
Minimum incremental storage capacity, unit conversion threshold	4