Related Party Transactions (Narrative) (Details) (USD $)	0 Months Ended		1 Months Ended			12 Months Ended				12 Months Ended		0 Months Ended	1 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended	12 Months Ended				1 Months Ended	12 Months Ended				0 Months Ended				0 Months Ended				12 Months Ended
	Dec. 30, 2010	Dec. 31, 2010	Feb. 28, 2013	Jan. 31, 2013	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 QRE GP [Member]	Dec. 31, 2012 QRE GP [Member]	Dec. 31, 2012 Fund [Member]	Dec. 31, 2011 Fund [Member]	Dec. 30, 2010 Fund [Member] QRE GP [Member]	Dec. 31, 2012 Fund [Member] QRE GP [Member]	Dec. 31, 2012 Fund [Member] QRE GP [Member]	Dec. 31, 2011 Fund [Member] QRE GP [Member]	Dec. 31, 2010 Restricted Units [Member]	Dec. 31, 2012 Restricted Units [Member]	Dec. 31, 2011 Restricted Units [Member]	Dec. 31, 2010 Predecessor's Capital [Member]	Dec. 31, 2012 Predecessor's Capital [Member]	Dec. 31, 2011 Predecessor's Capital [Member]	Dec. 31, 2010 General Partner [Member]	Dec. 31, 2012 General Partner [Member] QRE GP [Member]	Dec. 31, 2012 General Partner [Member] QRE GP [Member]	Dec. 31, 2011 General Partner [Member] QRE GP [Member]	Dec. 31, 2012 Limited Partner [Member]	Dec. 31, 2011 Limited Partner [Member]	Dec. 31, 2012 Limited Partner [Member] Fund [Member]	Dec. 31, 2012 Limited Partner [Member] Fund [Member]	Dec. 31, 2011 Limited Partner [Member] Fund [Member]	Dec. 31, 2012 Limited Partners-Public Common [Member]	Dec. 31, 2011 Limited Partners-Public Common [Member]	Dec. 31, 2010 Limited Partners-Affiliated - Common [Member]	Dec. 31, 2012 Limited Partners-Affiliated - Common [Member]	Dec. 31, 2011 Limited Partners-Affiliated - Common [Member]	Dec. 30, 2010 Limited Partners-Affiliated - Common [Member]	Dec. 31, 2010 Limited Partners-Affiliated - Subordinated [Member]	Dec. 31, 2012 Limited Partners-Affiliated - Subordinated [Member]	Dec. 31, 2011 Limited Partners-Affiliated - Subordinated [Member]	Dec. 30, 2010 Limited Partners-Affiliated - Subordinated [Member]	Dec. 31, 2012 Omnibus Agreement [Member]	Dec. 31, 2012 Minimum [Member] QRE GP And Affiliates [Member]	Dec. 28, 2012 December 2012 Purchase Agreement [Member]	Oct. 03, 2011 October 2011 Purchase Agreement [Member]
Related Party Transaction [Line Items]
General partner, outstanding (in units)	35,729				51,036	51,036	35,729		51,036
Predecessor's affiliate ownership of the GP														100.00%
Ownership percentage								0.10%		31.70%	67.00%	0.10%	100.00%		100.00%								0.10%	0.10%	0.10%	68.20%	32.90%	31.70%	31.70%	67.00%
Limited partners unitholders, outstanding (in units)																															51,299,121	17,292,279		7,145,866	11,297,737	11,297,737		0	7,145,866	7,145,866
Contributions from general partner		$ 715,000																				$ 715,000
Book value of assets contributed by the Predecessor						45,578,000	249,331,000												223,736,000	45,578,000	249,331,000												(137,051,000)				(86,685,000)
Distribution to the Fund	300,000,000	300,000,000					42,000,000
Quarterly administration fee equal to percentage of adjusted EBITDA due to QRM						3.50%
Quarterly administration fee for QRM		100,000				7,300,000	2,500,000
Percentage of first option properties that need to be proved developed reserves																																									70.00%
Equity capital of Fund																																									113,200,000
Possible participation in each acquisition opportunity																																									25.00%
Indemnification threshold per claim																																									75,000
Total imdemnification amount																																									4,000,000
Threshold ownership percentage of outstanding common units to purchase remaining outstanding common units																																										80.00%
Percentage of management fee converted to Class B units				80.00%
General and administrative expense allocated from the Fund		828,000				38,076,000	34,721,000
Percentage of distribution equal or exceed minimum quarterly distributions						115.00%
Target distribution per unit						0.4744
Percentage of quarterly management fee incentive base						0.25%
Management incentive fee incurred						6,100,000	1,600,000
Aggregate purchase price																																											143,600,000	578,800,000
Debt assumed for acquisition																																											115,000,000	227,000,000
Cash paid for acquisition																																											28,600,000
Management fee paid			700,000		700,000
Restricted unit awards granted																148,150	668,323	271,364
Restricted unit awards fair value																$ 2,800,000	$ 9,000,000	$ 4,800,000