CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
Oil and natural gas sales	$ 31,379	$ 53,017	$ 61,948	$ 86,857
Processing and other	274	2,342	472	4,135
Total revenues	31,653	55,359	62,420	90,992
Operating Expenses:
Production expenses	8,777	22,942	17,551	37,257
Depreciation, depletion and amortization	8,636	14,903	17,211	19,241
Accretion of asset retirement obligations	290	782	557	1,455
Management fees	0	2,855	0	4,970
Acquisition evaluation costs	0	1,042	0	1,042
General and administrative and other	3,344	5,241	6,777	10,630
Bargain purchase gain	0	(1,020)	0	(1,020)
Total operating expenses	21,047	46,745	42,096	73,575
Operating income	10,606	8,614	20,324	17,417
Other income (expense):
Equity in earnings of Ute Energy, LLC	0	646	0	708
Realized (losses) gains on commodity derivative instruments	(42,161)	2,071	(40,852)	2,913
Unrealized gains on commodity derivatives instruments	55,575	44,352	16,732	44,933
Interest expense, net	(7,854)	(12,015)	(9,530)	(12,884)
Other expense	0	(166)	0	(409)
Total other income (expense), net	5,560	34,888	(33,650)	35,261
Income (loss) before income taxes	16,166	43,502	(13,326)	52,678
Income tax expense	(235)	(211)	(91)	(211)
Net income (loss)	15,931	43,291	(13,417)	52,467
Net income attributable to noncontrolling interest	0	39,850	0	47,206
Net income (loss) attributable to controlling interest	15,931	3,441	(13,417)	5,261
General partner's interest in net income (loss)	16		(13)
Limited partner's interest in net income (loss)	15,915		(13,404)
Common unitholders' interest in net income (loss)	12,744		(10,694)
Subordinated unitholders' interest in net income (loss)	$ 3,171		$ (2,710)
Net income (loss) per limited partner unit:
Common units (basic and diluted) (in dollars per unit)	$ 0.44		$ (0.38)
Subordinated units (basic and diluted) (in dollars per unit)	$ 0.44		$ (0.38)
Weighted average limited partner units outstanding:
Common units (basic and diluted)	28,723		28,518
Subordinated units (basic and diluted)	7,146		7,146