Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 21, 2010 Predecessor [Member]
Cash flows from operating activities:
Net income (loss)	$ (12,037)	$ 79,751	$ 88,295	$ 31,913
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	2,588	105,796	94,993	66,482
Accretion of asset retirement obligations	130	5,648	4,593	3,674
Amortization of deferred financing costs	61	4,973	2,101	2,681
Recognition of unit-based awards	20	3,252	1,351	3,470
Gain (loss) on disposal of furniture, fixtures and equipment				(482)
General and administrative expense contributed by affiliates	828	38,076	34,721
Unrealized gains on derivative contracts	12,987	(14,987)	(94,999)	(5,598)
Deferred income tax benefit (expense)	(71)	372	849
Equity in earnings of Ute Energy, LLC				(3,782)
Gain on equity share issuance				(4,064)
Changes in operating assets and liabilities:
Accounts receivable and other assets	(4,278)	(8,531)	(29,029)	(39,727)
Accounts payable and other liabilities	2,580	12,800	9,682	41,378
Net cash provided by operating activities	2,808	227,150	112,557	95,945
Cash flows from investing activities:
Additions to oil and gas properties	(806)	(127,352)	(70,426)	(56,133)
Acquisition of oil and gas properties	(77,864)	(468,009)	(3,044)	(891,870)
Additions to furniture, equipment and other				(1,934)
Proceeds from sale of gas processing assets		3,082	1,327	890
Proceeds from sale of other assets				170
Property acquisition deposit				(8,000)
Net cash used in investing activities	(78,670)	(592,279)	(72,143)	(956,877)
Cash flows from financing activities:
Proceeds from unit offering, net of offering costs	279,750	376,938	41,963
Proceeds from senior note offering, net of discount		295,860
Distributions to the Fund	(300,000)		(42,000)
Proceeds from issuance of units to the General Partner		115	715
Management incentive fee to the General Partner		(7,692)
Distributions to unitholders		(96,472)	(46,026)
Intercompany financing from the Fund	387
Contributions by partners and non-controlling interest owners				474,864
Distributions to partners and non-controlling interest owners				(30,000)
Contributions from (distributions to) the Predecessor	52,579	(34,973)	(25,507)
Proceeds from bank borrowings	248,000	476,500	275,000	584,383
Repayments on bank borrowings		(506,500)
Repayment of debt assumed from the Fund	(200,000)	(115,000)	(227,000)	(113,752)
Units withheld for employee payroll tax obligation		(322)
Deferred financing costs	(2,659)	(8,922)	(2,321)	(12,047)
Net cash provided by (used in) financing activities	78,057	379,532	(25,176)	903,448
Increase (decrease) in cash and cash equivalents	2,195	14,403	15,238	42,516
Cash and cash equivalents at beginning of period		17,433	2,195	17,156
Cash and cash equivalents at end of period	$ 2,195	$ 31,836	$ 17,433	$ 59,672