Organization And Operations (Details) (USD $)	0 Months Ended		9 Months Ended							0 Months Ended		9 Months Ended					0 Months Ended			1 Months Ended	9 Months Ended	0 Months Ended			9 Months Ended
	Apr. 17, 2012	Jan. 03, 2011	Sep. 30, 2012	Jul. 30, 2012	Dec. 31, 2011	Oct. 03, 2011	Oct. 01, 2011	Dec. 22, 2010 QRE GP [Member]	Oct. 03, 2011 Class C Convertible Preferred [Member]	Apr. 17, 2012 Limited Partners-Public Common [Member]	Dec. 22, 2010 Limited Partners-Public Common [Member]	Sep. 30, 2012 Limited Partners-Public Common [Member]	Sep. 30, 2012 General Partner [Member] QRE GP [Member]	Sep. 30, 2012 Limited Partner [Member] Limited Partners-Public Common [Member]	Sep. 30, 2012 Prize [Member]	Apr. 20, 2012 Prize [Member]	Apr. 17, 2012 Over-Allotment [Member]	Apr. 17, 2012 Fund [Member]	Oct. 01, 2011 Fund [Member]	Oct. 31, 2010 Fund [Member]	Sep. 30, 2012 Fund [Member]	Apr. 17, 2012 Fund [Member] Limited Partners-Public Common [Member]	Dec. 22, 2010 Fund [Member] Limited Partners-Affiliated - Common [Member]	Dec. 22, 2010 Fund [Member] Limited Partners-Affiliated - Subordinated [Member]	Sep. 30, 2012 Fund [Member] Limited Partner [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]
Organization And Operations [Line Items]
Partners' capital account, units, sold in public offering		2,250,000								6,202,263	15,000,000			8,827,263			2,625,000					11,297,737				11,297,737	(11,297,737)
Partners' capital account, price per unit, sold in public offering	$ 19.18																	19.18
Partners' capital account, units, exchange for net assets																							11,297,737	7,145,866
Partners' capital account, units, capital contribution								35,729
Partners' capital account, public sale of units net of offering costs	$ 162,000,000	$ 42,000,000
Class C convertible preferred unitholders issued (in units)			16,666,667		16,666,667				16,666,667
Period of time for the underwriters over-allotment option																	30 days
Value of preferred units issued			369,278,000		358,138,000
Debt assumption for oil and gas properties						227,000,000
Preferred units, fair value of preferred unit							$ 21.27
Preferred unit valuation							354,500,000
Net assets contributed by Fund																			252,000,000
Deemed Fund distribution																				102,500,000
Date of acquisition															Apr. 20, 2012
Effective date of acquisition															Jan. 01, 2012
Cash paid for acquisition																225,000,000
Transaction costs	500,000
Underwriter's discount	6,800,000
Senior notes issuance date			Jul. 30, 2012
Senior notes face amount				$ 300,000,000
Senior notes stated interest rate				9.25%
Ownership percentage												61.10%	0.10%								38.80%				38.80%