Related Party Transactions (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended					12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 QRE GP [Member]	Jun. 30, 2012 Fund [Member]	Jun. 30, 2012 General Partner [Member] QRE GP [Member]	Jun. 30, 2012 Limited Partner [Member] Fund [Member]	Jun. 30, 2012 Restricted Units [Member]	Dec. 31, 2011 Restricted Units [Member]	Jun. 30, 2012 Limited Partners-Affiliated - Common [Member]	Dec. 31, 2011 Limited Partners-Affiliated - Common [Member]
General partner, outstanding (in units)	41,747		41,747		35,729	41,747
Predecessor's affiliate ownership of the GP						100.00%
Ownership percentage							38.80%	0.10%	38.80%
Limited partners unitholders, outstanding (in units)												0	11,297,737
Quarterly administration fee equal to percentage of adjusted EBITDA due to QRM			3.50%
Quarterly administration fee for QRM	$ 1,900,000	$ (700,000)	$ 3,600,000	$ 100,000
General and administrative expense allocated from the Fund			14,963,000	13,916,000
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			2,400,000
Restricted unit awards granted										239,281	271,364
Restricted unit awards fair value										$ 4,000,000	$ 5,500,000