MEMBERS' EQUITY Table 1 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Changes to our members’ equity
Balance as of December 31, 2012			$ 412,822
Net income (loss)	12,559	(33,208)	23,634	(22,162)
Distributions to unitholders	(23,200)		(46,445)	(43,428)
Other Comprehensive Income (Loss), Net of Tax	89		286
Unit-based compensation			400
Balance as of June 30, 2013	$ 390,697		$ 390,697