MEMBERS' EQUITY Table 2 (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Our cash distributions applicable to the period in which the distributions were earned
Cash distributions per unit	$ 0.545	$ 0.510	$ 1.090	$ 1.020
Total cash distributions	$ 23,236	$ 21,713	$ 46,458	$ 43,433