Net Income/Loss Per Limited Partner Unit (Narrative) (Details)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Limited Partners-Public Common [Member]
Ownership percentage	61.10%
Limited partners unitholders, outstanding (in units)	37,422,351	17,292,279
Limited Partners-Affiliated - Subordinated [Member]
Limited partners unitholders, outstanding (in units)	7,145,866	7,145,866
General Partner [Member] | QRE GP [Member]
Ownership percentage	0.10%