Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended						0 Months Ended		12 Months Ended						0 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 21, 2010 Predecessor [Member]	Dec. 21, 2010 Realized Gain (Loss) [Member] Predecessor [Member]	Dec. 21, 2010 Commodity Contract [Member] Predecessor [Member]		Dec. 31, 2010 Commodity Contract [Member] Realized Gain (Loss) [Member]		Dec. 31, 2012 Commodity Contract [Member] Realized Gain (Loss) [Member]		Dec. 31, 2011 Commodity Contract [Member] Realized Gain (Loss) [Member]		Dec. 21, 2010 Commodity Contract [Member] Realized Gain (Loss) [Member] Predecessor [Member]		Dec. 31, 2010 Commodity Contract [Member] Unrealized Gain (Loss) [Member]	Dec. 31, 2012 Commodity Contract [Member] Unrealized Gain (Loss) [Member]	Dec. 31, 2011 Commodity Contract [Member] Unrealized Gain (Loss) [Member]	Dec. 21, 2010 Commodity Contract [Member] Unrealized Gain (Loss) [Member] Predecessor [Member]
Revenues:
Oil and natural gas sales	$ 8,927	$ 368,189	$ 356,579	$ 244,572
Processing and other	59	3,809	4,325	8,814
Total revenues	8,986	371,998	360,904	253,386
Operating Expenses:
Production expenses	3,498	143,938	132,227	108,408
Depreciation, depletion and amortization	2,588	105,796	94,993	66,482
Accretion of asset retirement obligations	130	5,648	4,593	3,674
Management fees				10,486
General and administrative	925	42,275	37,315	25,477
Acquisition and transaction costs		4,000		6,340
Other expense				224
Total operating expenses	7,141	301,657	269,128	221,091
Operating income (loss)	1,845	70,341	91,776	32,295
Other income (expense):
Equity in earnings of Ute Energy, LLC				3,782
Gain (losses) on commodity derivative contracts	(13,276)	42,850	18,434	6,163	565	13,577	[1]	(289)	[1]	49,800	[1]	(72,053)	[1]	5,373	[1]	(12,393)	3,271	119,913	8,204
Gain on equity share issuance				4,064
Interest expense, net	(1,266)	(43,133)	(50,491)	(22,179)
Other income (expense)				(482)
Total other income (expense), net	(13,948)	9,938	(2,631)	(274)
Income (loss) before income taxes	(12,103)	80,279	89,145	32,021
Income tax benefit (expense), net	66	(528)	(850)	(108)
Net income (loss)	$ (12,037)	$ 79,751	$ 88,295	$ 31,913
Net loss per limited partner unit:
Unitholders' (basic) (in dollars per unit)	(0.21)	0.19	0.10
Unitholders' (diluted) (in dollars per unit)	(0.21)	0.19	0.10
Subordinated units (basic and diluted) (in dollars per unit)	(0.21)	0.11	0.10
Weighted average number of limited partner units outstanding:
Common units (basic) (in units)	26,298,000	35,132,000	28,728,000
Common units (diluted) (in units)	26,298,000	35,282,000	28,728,000
Subordinated units (basic and diluted) (in units)	7,146,000	6,970,000	7,146,000

[1] Gain (loss) on commodity derivative contracts is located in other income (expense) in the consolidated statements of income