CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 1,212	$ 2,195
Accounts receivable: oil and gas sales	13,583	3,014
Due from affiliate	6,479	0
Due from general partner	0	715
Derivative instruments	21,305	9,027
Prepaid and other current assets	413	1,264
Total current assets	42,992	16,215
Noncurrent assets:
Oil and gas properties, using the full cost method of accounting	460,987	444,710
Less: accumulated depreciation, depletion and amortization	(25,956)	(913)
Total property and equipment, net	435,031	443,797
Derivative instruments	40,139	9,020
Deferred taxes	(20)	341
Other assets (See Note 6)	10,905	2,645
Total noncurrent assets	486,075	455,803
Total assets	529,067	472,018
Current liabilities:
Due to affiliate	0	442
Current portion of asset retirement obligations	1,686	1,848
Derivative instruments	6,412	7,045
Accrued and other liabilities	8,054	3,806
Total current liabilities	16,152	13,141
Noncurrent liabilities:
Long-term debt	266,000	225,000
Derivative instruments	11,375	19,832
Asset retirement obligations	17,304	16,440
Deferred taxes	20	(341)
Total noncurrent liabilities	294,699	261,272
Commitments and contingencies (See Note 10)
Partners' capital:
General partner (35,729 units issued and outstanding as of September 30, 2011 and December 31, 2010)	715	708
Total partners' capital	218,216	197,605
Total liabilities and partners' capital	529,067	472,018
Limited Partners - Public Common [Member]
Partners' capital:
Limited partners	323,270	276,723
Total partners' capital	323,270	276,723
Limited Partners - Affiliated Common [Member]
Partners' capital:
Limited partners	(64,790)	(48,898)
Total partners' capital	(64,790)	(48,898)
Limited Partners - Affiliated Subordinated [Member]
Partners' capital:
Limited partners	(40,979)	(30,928)
Total partners' capital	$ (40,979)	$ (30,928)