Partners' Capital (Schedule Of Partners' Unit Activity) (Details)	0 Months Ended						9 Months Ended					0 Months Ended	9 Months Ended
	Apr. 25, 2012	Jan. 03, 2011	Apr. 17, 2012 Limited Partners-Public Common [Member]	Dec. 22, 2010 Limited Partners-Public Common [Member]	Sep. 30, 2012 Class C Convertible Preferred [Member]	Dec. 31, 2011 Class C Convertible Preferred [Member]	Sep. 30, 2012 General Partner [Member]	Sep. 30, 2012 Limited Partner [Member] Limited Partners-Public Common [Member]	Dec. 31, 2011 Limited Partner [Member] Limited Partners-Affiliated - Common [Member]	Sep. 30, 2012 Limited Partner [Member] Limited Partners-Affiliated - Subordinated [Member]	Dec. 31, 2011 Limited Partner [Member] Limited Partners-Affiliated - Subordinated [Member]	Apr. 17, 2012 Fund [Member] Limited Partners-Public Common [Member]	Sep. 30, 2012 Fund [Member] Limited Partner [Member] Limited Partners-Public Common [Member]	Sep. 30, 2012 Fund [Member] Limited Partner [Member] Limited Partners-Affiliated - Common [Member]
Partners' Unit Capital Activity [Line Items]
Balance - December 31, 2012					16,666,667	16,666,667	35,729	17,292,279	11,297,737	7,145,866	7,145,866
Vested units awarded under our Long Term Incentive Performance Plan								18,359
Reduction in units to cover individuals' tax withholdings								(918)
Issuance of units to General Partner	6,018						6,018
General Partners' account, units sold to QRE GP	6,018						6,018
Units sold to public		2,250,000	6,202,263	15,000,000				8,827,263				11,297,737	11,297,737	(11,297,737)
Balance - June 30, 2012					16,666,667	16,666,667	41,747	37,434,720	11,297,737	7,145,866	7,145,866